Netmonkey, if your friend likes platformers, linear storylines, and has a sense of humor, yes, get him Psychonauts.
If your friend likes platformers and enjoys fine art direction and off-the-beaten-path puzzles, yes, get him ICO.
If your friend likes anything else, get him a gift card. Or a hooker.
Why is Psychonauts $50, anyway? I don't see many brand-new-released games for $50. Hell, a used GameCube with paddles and Mario Sunshine is, what, $7 now?
And where was the action in KOTOR, except for the totally-turning-my-dad-off-from-it mini games?