For me the ds easily, a whole lot of niche games that really appeal to me are on the ds (etrian odyssey, izuna (though I hate to admit it), nanostray 1+2, hotel dusk, trace memory, touch detective, viewtiful joe)
plus plenty of more mainstream games, RE:ds , Call of duty 4, brothers in arms (these 2 seem really under appreciated) advance wars, age of empires,
great legacy games like Castlevania, Metroid, Sonics, and Marios
licensed games that inexplicably aren't trash like transformers, tony hawk's and the spiderman games
plus it has Contra 4, so even if it had no other games I cared about it'd win
plus this isn't a comprehensive list of ds games I've enjoyed,
not to say the psp is a slouch in terms of good games, but it doesn't have the diversity and volume of the ds basically I've only enjoyed a few original games Jeanne D'arc, Silent Hill origins, Sengoku cannon 3, Me and my Katamari, and that's it, but collections and remakes have been fantastic for the system
I HAVE A DOUBLE DRAGON CAB IN MY KITCHEN!!!!!!
NOW A PUNISHER CAB!!!!!!!!!!!!!
