89 hours playing Football Manager 2013 and around the same on FiFA 13. I like me some football.
I haven't played that many 2012 games. I've probably spent my most time with Journey and Uncharted 3 this year. I've played through Journey/watched my friends play through it probably in total 10-12 times now. I'm looking forward to playing some more this break now that the semester is over.
According to Steam, I spent the most time in Faster Than Light at 55 hours. I probably spent around that in Diablo 3 but I kinda regret that now. Looking back, that game was not all that great, and I have found the bit of Torchlight 2 that I have played much more interesting (also shotguns!)
Totally forgot about Diablo III. I easily spent 200+ hours in it around release. When it is you and a buddy or two (and before Inferno Act II brick wall) that game is a ton of fun. Rather than bashing our heads against a wall trying to grind the gear to move forward, we just made new characters, hence the high hour count.
I didn't play a lot of 2012 games in 2012. I'd like to say I spent the most time playing Skyrim, but if it's got to be a 2012 release, then probably a tie between Tales of Graces F and Style Savvy: Trendsetters. Also spent a good amount of time on Zero Escape: Virtue's Last Reward.
I got back into Dark Souls in a big way this year, also went back to Red Dead and played quite a bit of DOA5. Spent a good chunk of time with ME3 as well. I'll have a lot of 2012 games to catch up on next year, not to mention the stuff that actually comes out in 2013...