I have a PSP. I liked Lumines, I played Need for Speed and I was tempted to grab Hot Shots Golf and GTA.
It has worthwhile software.
But DS has more - and more unique stuff. Feel the Magic, Kirby\'s Canvas Curse, Metroid Pinball, Warioware Touched, Sonic Rush, Phoenix Wright, Castlevania DS, Mario Kart DS. There\'s the upcoming wifi Animal Crossing. Sega\'s got Rub Rabbits and Monkey Ball on the way.
Pac Pix looked different. Yoshi\'s Touch & Go was good until Kirby bested it. I\'ve heard good things about Meteos. Lost in Blue looked unique.
And even though I hated them, some people dug Nintendogs and the Mario 64 rehash with mini-games.
Because every game is a potentially new experience, I find myself trying different things on the DS whenever I can.
The PSP was a fun toy for a while, I showed it off, and now it sits in a drawer, permanently charging. And unless Santa is bringing GTA down from the north pole, my PSP is (unfortunately) staying put.
The PSP blew me away at first, but the steady stream of cool games for the Nintendo DS keeps it out front, in my opinion.
-Dan
//but PSP can play p0rn, so.. +1