10. Actor
Sorcerers can be played many different ways, but one of them is the face of the party. Handling social encounters, lying and persuading others to do your bidding is a very viable option combined with your high charisma score.
Actor, is one of the feats that can flavor your sorcerer this way and ensure you are not behind on that charisma. Increasing your charisma stat by +1 and giving you advantage on Deception and Performance checks when it comes to disguising yourself, this feat will allow you to master the art of espionage.
Full details; http://dnd5e.wikidot.com/feat:actor
9. Magic Initiate
Targeting the less known spells problem once more, this feat combined with another (Eldritch Adept) that we will talk about soon is one of my favorites.
Magic Initiate allows you to pick two cantrips from the bard, cleric, druid, warlock or wizard list. This is already huge, considering cantrips are unlimited in 5e and having two more is very powerful.
It also lets you learn a 1st level spell, which you can cast once without having to spend a spell slot. Sadly, this one doesn’t enter your known spell list, so it’s a one-time thing. Though, since the feat depiction is up to interpretation a lot, your DM might allow you to actually learn that spell.
My favorite combo with this feat is taking the Eldritch Blast cantrip from Warlock, and combine that with an Eldritch Invocation through the Eldritch Adept feat. Basically giving your sorcerer, a charisma caster like warlock, the (debatably) strongest cantrip in the game with a boost of invocation.
Full details; http://dnd5e.wikidot.com/feat:magic-initiate
8. Fey Touched
Sorcerers are capable of casting their known spells many times, but they don’t have the variety that a wizard might. Fey Touched is a feat that’ll not only create some niche roleplay avenues, but also expand your spell list.
Once more, it allows you to increase your Charisma by +1, or one of your other two mental stats if you wished. And gives you Misty Step as well as a 1st level spell of your choice, belonging to the divination or enchantment school of magic.
Not only does it let you cast these spells once without spending spell slots, it also adds them to your spell list, so you can always use your bountiful sorcerer slots on them.
Full details; http://dnd5e.wikidot.com/feat:fey-touched
7. Shadow Touched
Similar to the one above, this feat caters to those who are more interested in the dark side of things. Once again, it allows you the same ability score improvements as Fey Touched.
Instead of Misty Spell like Fey Touched, it gives you Invisibility and a 1st level spell of your choice from the necromancy or illusion schools. And we all know how incredibly crucial invisibility can be, in dire situations or in general.
It’s a vital spell for almost all casters to have, and sorcerers may not always get the opportunity to spare space for it.
Full details; http://dnd5e.wikidot.com/feat:shadow-touched
6. Eldritch Adept
I spoke about this feat a little bit above, let’s give you the details.
Warlocks are similar to sorcerers when it comes to the fact that they don’t know that many spells, and worse than sorcerers that they cannot cast many spells. They are strong and a viable option, due to their Eldritch Invocations.
Giving them the options to cast some spells unlimited, at will, and customize their Eldritch Blast to their needs.
This feat gives a sorcerer this option. Letting you choose one invocation from the list without prerequisites (if you are multiclassing to warlock for some reason, if you meet the prerequisites, it should be fine).
Casting Mage Armor at will, or speaking to animals at will, it certainly will strengthen your sorcerer and save you from having to waste your known spell slots on mundane but vital spells, and focus on damage instead. I already mentioned my favorite combo with this feat under Magic Initiate.
Full details; http://dnd5e.wikidot.com/feat:eldritch-adept
5. Ritual Caster
Once again a feat that targets the low known spell number of sorcerers. Ritual Caster allows you to choose a class; bard, cleric, druid, sorcerer or warlock and pick two 1st level spells that have the ritual tag on them to add to your ritual book.
What does the ritual tag mean? In D&D, some spells can be cast by spending time and materials longer than normal, doing an actual ritual. The advantage of this is that you do not spend a spell slot when you cast from a ritual.
This feat also allows you to add spells to your ritual book as you come across scrolls, as long as it’s from the list of the class you chose and has the tag. The spell level also cannot be higher than half your level.
This is an amazing addition to any sorcerer, that’ll allow you to either master more sorcerer spells, or explore other classes’ spells.
You can be the cleric your party needs but doesn’t deserve.
Full details; http://dnd5e.wikidot.com/feat:ritual-caster
4. War Caster
Sorcerers are a type of caster that’s constantly active in battle. A wizard might provide protections beforehand and step back, a cleric may only cast a few spells and heal when need be, but a sorcerer is always a vital part of the combat.
There certainly will be situations where you have to cast while face to face with enemy, and have to be best prepared.
War Caster, gives you advantage on your concentration checks that allows you to keep a spell going longer, if it can. It also allows you to cast spells while both your hands are full, with a weapon and a shield.
But the strongest of them all is that you can actually cast a spell when an enemy provokes an attack of opportunity, instead of having to whack them with your likely puny sword.
No more watching from the side as the warriors get that last hit on the fleeing enemy.
Full details; http://dnd5e.wikidot.com/feat:war-caster
3. Spell Sniper
Ah, the spell sniper. Another amazing feat to combine with Eldritch Adept.
Sorcerers are spell flingers, which means they rely on causing damage with their spell attacks rather than passive and bonus providing magic. Spell Sniper doubles the range of every spell you cast that needs you to roll an attack. All these spells also ignore half and ¾ cover.
On top of that, it lets you pick a cantrip that requires an attack roll from the bard, warlock, sorcerer, cleric, druid or wizard list. I’d suggest choosing a Charisma based class since the class you choose determines your spellcasting ability for this cantrip.
One more cantrip to your list, and destroying your enemies from even further away.
Want to break the game? Take Eldritch Blast through this feat, and the Eldritch Spear Invocation through the Eldritch Adept. Use your sorcerer’s distant spell metamagic option when casting Eldritch Blast.
Congratulations, you now can fling Eldritch Blast up to 1200ft.
Full details; http://dnd5e.wikidot.com/feat:spell-sniper
2. Metamagic Adept
A considerably big difference between earlier editions of D&D and 5e is that the renowned Metamagic feats are no longer for every caster, but unique to sorcerer instead as class abilities.
Combined with the spontaneous casting of sorcerer it’s a signature and vital mechanic that every sorcerer needs to get properly acquainted with. Metamagic allows you to strengthen your spell, extend their duration or range, and more.
Now, a 20 level sorcerer will have only 4 metamagic options that they chose and use, from a list of 10 (Including Tasha’s Cauldron of Everything). This feat grants you a whopping number of 2 more, that you can swap with others each time you are on an ASI level. (Ability Score Improvement)
And! It gives you 2 spare sorcery points that you can use for these metamagic feats. (and only these, though.)
Full details; http://dnd5e.wikidot.com/feat:metamagic-adept
1. Elemental Adept
As a sorcerer you heavily rely on your elemental damage spells. Depending on which one you chose to focus, sometimes enemies with resistance against your element might spoil your plans.
While this can be solved with a metamagic option, Elemental Adept is always most reliable. You can also choose this feat multiple times if you wish, and no longer should you be sad about rolling 1s in your damage as they will all count as 2.
It’s one of the most vital feats for a sorcerer to have, if not a must have, especially if your DM doesn’t use the Tasha’s Cauldron for Everything expansion.
Full details; http://dnd5e.wikidot.com/feat:elemental-adept