It really depends on the games the person wants. You have to be really careful with DS games, as a lot are developed by fly-by-night jokers with no development skills, just a fancy license and too much money to blow on a three month production. Also, companies tend to make a lot of gimmicky games, relying too much on that damned stylus. But the games that ARE good are REALLY good. The PSP has little to offer, I find...the best games for the PSP are developed by homebrewers, not by official dev studios. So realistically, neither has much to brag about, and it all just comes down to the games...buy the system that has the games you want. I chose the DS personally, because homebrew code is far easier to write for it and it had some games I wanted. The PSP has nothing to offer me.