because i think that the original psp is better
infra red
bigger and more ergonomically designed
a umd drive
not a fingerprint magnet (albeit if i put on the chrome faceplate it will become one)
a standard mini-usb port
Normal memory stick port (and there are adaptors for sd cards and mark 2 cards)
bigger screen
louder speakers (i sense an argument brewing with this one)
much more third party support for hardware (as in batteries, usb cables etc., the go is too rock solid)
go! cam support
No need to be online in order to get more games and such
the games you own don't take up space on your memory stick and even some videos are the same
And after all of that, the psp 1000 can still play psp go games (plus games that it can't play)