I got sucked into Sleeping Dogs. Probably the best GTA style game i've played
Just got into Fallout: New Vegas, found it much more engrossing than Fallout 3. The faction karma makes more sense, quests are generally decent, feels less linear after a certain point, you don't get free stat level ups unless you sacrifice a trait so stats continue to matter as you play. Multiple ways to do quests (repair, science, lockpicking, medical, speaking all useful). I got bored of F3 much faster than New Vegas. New Vegas does feel kind of linear in the way you progress early on but opens up after a certain town. Theres lots of new DLC areas too that are supposed to be good.
Some other random stuff: Deus Ex: HR, Portal 2, The Walking Dead (telltale), Amnesia, Tropico 4
I want to start getting into other multiplayer games rather than just doing cRPG. Pretty bored of other stuff like normal FPS games though. Could maybe try some co op like Saints Row or maybe SSF4 (got this recently)
Really enjoyed Primordia (
http://store.steampowered.com/app/227000) recently. Good little indie adventure game. Got the Wadget eye games pack on GoG, actually got a bunch from gog in their sale. Dungeon keeper 1 & 2, syndicate wars, alpha centauri, startopia, theme hospital, wallace & gromit adventure. Planescape: Torment is still worth playing. These are all old though except Primordia (and thats very indie)