I don't play nearly as much as I used to, but I still do.
I played all the way through Zelda: Twilight Princess, Zelda: Phantom Hourglass, Puzzle Quest, New Super Mario Bros, Call of Duty 2, and Metroid Prime 3 in the past year. COD4 just came out, so I'm going to delve into that and get into the multiplayer. Might check out Gears of War and Crysis, too.
And, dude, Super Mario Galaxy comes out this month.
Woo
I'm 26. It does take me a bit to get really into any particular game. But after an hour or so of play, I know whether I'll enjoy the game or not. If not, I'll just dump it. If I will like it, I play it and get really into it. Demos these days aren't really enough to get you into a game. If I played the COD4 demo, it wouldn't hold my interest at all. But I know I'll enjoy the meat of the game.