i bought a psp when it first came out..i purchased metal gear solid acid and i hated it..i later traded in my psp cause no games in the psp library interested me at the time. I bought a DS when it first came out as well and got a couple games at launch..i bought a DS lite when that came out first day...i love my DS. I am enjoying The World Ends with You very much right now, but there is also mario kart, advanced wars, mario and luigi, meteos, 2 castlevanias (soon to be 3), kirby canvas curse, brain age, new super mario bros, and many other good games. In June i bought the special edition god of war psp b/c i love god of war and wanted to play it ..well that was a big mistake by me...it took me only 5+ hours to beat GoW...so i recently just traded in my psp again b/c the psp library doesn't interest me very much at all. I also picked up patapon and absolutely hated it.
bottom line: in my opinion DS>>>>>>>>>>>>PSP
"If new things are so great, where have they been the whole time?"
