Tough call. I like RPGs, and the DS has a lot of them. But the PSP has other games I like such as Crisis Core, Dissidia, Lunar, Disgaea(albeit, not very good at it, I never have the time to concentrate on them), BlazBlue, soon to be Kingdom Hearts BBS. DS wise: Phoenix Wright, Luminous Arc, TWEWY, KH 358/2 Days, Megaman SF 3, etc. I play my DS more, but I still like my psp because I can play a lot of other things I never could, and portable. (I love PSX games on PSP, Tomba 2, portable, sold.)