seriously? what if i was a 9 year old girl who liked My Little Pony Tails Adventures?
Tetris is pretty cool. and the first Zork text-based game.
how about some other games you've enjoyed? or at least a genre?
i've been having a blast with Left 4 Dead and Crysis. FEAR was pretty cool, I've heard good things about Mirror's Edge and Fallout 3, any and all the Half-Life games, Lord of the Rings Online (if you like mmorpgs), Oblivion (a little older, but a great game), etc.
if you name some games you've enjoyed i might be able to narrow my suggestions...