I don't read too many of them and when I look for more, it's always like this, you get bombarded with too many to even try. The "video game" ones I regularly read include the two on this site (Which I heartily enjoy), Penny Arcade (Mostly for the blog posts), The Trenches (Because it's associated with PA), VG Cats (Other people who mentioned this remind me of how much I miss this, why doesn't he update?), Super Effective (Because of VG Cats but this one's great on it's own), Awkward Zombie (Although I only ever read the ones that are posted on Dorkly since I forget to check her site, anyone know if she has a Twitter I could follow for updates?), and other random strips I see on Dorkly and Kotaku.
I'd say my favorites out of those are Critical Miss, Name Game, Super Effective, and Awkward Zombie.