I would have to say DS as well. Although I'll agree graphics, and probably most games are better on the PSP, really it's just another console that happens to be handheld. Playing the DS is great because of teh many things possible with the Stylus.

I played my friends DS and made him lend it to me because I got obsessed with Tiger Woods. In ways I prefered it to the PS2 version, because that was so easy, and it really enjoyable swinging the club with the stylus.

All in all it depends on what you want. Innovative gameplay, or steller games and graphics.

P.S. Can someone confirm this for me? I heard that the PSP has no rechargable batteries but uses AAA. If this is true, that reason alone brings the DS alot higher than the PSP.