Those are some good games :)
I tried to make my girlfriend play Viva Pinata and she was terrorized by it. Did anyone else find that game really hard to get into?
COD4 is a great game for anyone who can stand (relatively) realistic military games. It's a classic, really. I found that level where you're in the bomber and it kind of feels like you're playing an old-school video game with a friend watching really disturbing. To think it's come full circle, and killing people en mass has gotten to be just like playing a video game.
ICO is a great game if you like puzzle/adventure games. If you didn't like Shadow then the aesthetic probably won't grab you. It's a game that keeps getting better as you play and makes you love it by the end, but if you really don't like the beginning it's probably not worth playing with all the other stuff you've got.
KZ2 I've only really played for the multiplayer. The classes make it really fun. (And the graphics are really amazing on some of the stages with color.)
I'd say COD4 or ICO.
