I think in part what one of the problems is, I tend to want to play quick light gameplay and also and in alot of ways the weaker hardware of the ds forces most games to keep a retro look which I find I prefer on a handheld. Personally the very well recieved Metroid and even that Lego game that's also in first person I hated them on the DS. On a handheld I tend to prefer the 2d games. And the simple 3d style like that of FFIII I also enjoyed and I'm happy to see Square coming out with more titles like that. The DS just feels simple, quick, good battery life and the touch screen definitly enhances gameplay, adds that little bit of uniquiness. I found that I take my DS everywhere to play, while I tend to play psp at home in bed. And since I got my Wii and 360 I haven't played it too much, with the exception of Jewel summoner(though I've already play Pokemon longer).
And just to be clear, I'm not trying to bash the psp, the psp has alot to offer and I know why people love and I'd never say I regret buying one. But it clearly isn't as popular as the DS, and I'm attempting explain why through my own experience. So I find the problem is that it's not lacking good games. It's just lacking original franchise with addicting gameplay that can become a phenomenon that the DS has so many of. Monster Hunter is really the only one.
