I preferred the PSP. It was a great machine with some awesome utility. Back then (at launch circa 2005) smartphones were few and far in between and you could use it to browse the web, play music on top of playing games. When softmodded it really opened up with extra stuff like emulation; honestly, it felt amazing that you could whip out a SNES, Genesis or N64 game out of your pocket and even connect to the TV with AV out. Plus the games had me invest more time in it. I played GOW, GTA: China Town Wars, Tekken 5:Dark Resurection/6, KH:BBS, Ridge Racer, Persona 3 Portable etc etc and a lot of PSOne games on there.
On the hardware side PSP was better built, had quality normal sized buttons and a way better form factor. I really like the 3DS too but PSP was god tier in terms of portable gaming (for me).
