i have the zelda DS. i wouldn't buy a PSP but mostly cos i already have a DS. DS is very friendly to me and I like how it folds neatly.
i never really thought of getting a PSP actually. but i never was a hand held type of person to begin with. only games that actually kept my attention on DS are YGO games and Professor Layton.
yes i'm a sexy free and single ಠ_ಠ