I like that you said favorite game, and not best game.
My favorite this year is No More Heroes. I've beaten five times already, and after reading some of the comments in the recent NMH thread, I might just make it six. Crazy over the top parody of "hardcore" gaming with some killer boss fights. Perfect for a nut like me.
After that I'd say Braid and World of Goo are tied for second. A pair of freaky creative 2D puzzle games with unique art styles, mesmerizing music, ominous and occasionally cryptic story elements, all enhancing an already great set of puzzles.
And bringing up the rear would be Endless Ocean. A serene and relaxing tour of exotic sea life set to lovely music. I put it about 20 hours in that game, and there was still tons of fish I hadn't seen and treasures I hadn't collected.
I'd like to say Wii Music as well, but I still haven't gotten much of a chance to play it. Seems like I keeping getting side tracked by other nonsense I stick on my GameFly queue. =P
