I like the DS the best. It adds new gameplay features, is wireless and online, has a touch screen, is protected, cheaper, has better batery life, has a lot of 3rd party and is made by Nintendo. The only bad thing is that it can't play movies (they said that about the GBA and now we have GBA Video) and if the UMD's catch on, Sony can get ahead with media and PSP. The PSP doesn't have the clamshell and will get scratched more easily, plus has little battery life. Also, it advertises movies, when nobody is putting out UMD movies right now. Most people just switched from VHS to DVD. Even that took a while. When movie companys finally switch to UMD (if ever), it will be a while. By that time, the DS/PSP will already pass.