Well, on the last few weeks I played all over again Tomb Raider 1+2+3 for PC. Gosh, it took me a lot of time. Those old games were really big.
More recently, I've been playing a game that always caught my curiosity, but I never was able to find it anywhere, until a few days ago: The Longest Journey + Dreamfall. Those are adventure games, with gorgeous environments and great story. I finished the 1st one last Saturday, and now I'm reaching the end of the 2nd, and I'm really having a great time.
By the way, someone mentioned The Witcher 2 a few posts ago. I've been through that one too. A beautiful and awesome game, but still I liked more the system of the 1st one. Still, one of the best games for PC of 2011, undoubtfully.