The DS, because the PSP is missing an analogue stick.
The more I play my PSP the more I realize that certain games require a second one. There alot of games that do not need such camera control so old school rpgs, 2d fighters, card games, puzzle games and unique games are good on the PSP.
The one MAJOR negative is the UMD loading. My favorite feature is the standby mode. You can put system on standby come back days later turn it on and it is picks up right where you left off. I am not sure if I said thise here before but the only thing that makes the PSP less than perfect is the amount of ram. If it had more it actually might solve many of the issues that system has.
Games make me happy! PSN ID: Staticneuron Gamertag: Staticneuron Wii Code: Static Wii - 3055 0871 5802 1723