1. The Last Remnant - Completely surprised by how much fun I had with this game. Over 100hours in it already.
2. Borderlands - The moniker "Diablo with guns" works perfectly and, seeing as I love both Diablo and OTT guns, this game is a no-brainer.
3. Spellforce 2 + Expansion - I'd played this in the past but this was the first year I went through Dragon Storm as well. These games are just so much fun to play and the best RTS/RPG hybrid in my mind.
4. FarCry 2 - Another surprise after hearing all the negative comments about it. It's now my favourite FPS and I've played it through several times, with different styles of play each time.
5. Mirror's Edge - Unique, beautiful, and fun. The game has a few annoying problems (such as Faith not always grabbing onto something) but was well worth it otherwise. If only I didn't have the Steam version so could play the Time Trials DLC.
[Kind of wish I could have fitted GTA4 on there somewhere, but I was growing sick of that game by the end. Mentions also go to World At War (much more fun than Modern Warfare series), Crysis (has some of the best 'linear' FPS levels ever), and Torchlight (for being like crack)]