PSP really was the best handheld. Spent countless hours with mine. With the exception of maybe Chinese handhelds (emulation boxes), anything since has been a disappointment. I remember buying a cheap 'TOOL' battery and thinking that was the craziest exploit to install a mod (cfw) ever.
I still have it, but the power switch spring is shot, the joystick mounting is broken, the batteries are long since dead, and I just don't want to put money (and time) into fixing it when aforementioned Chinese handhelds are so cheap. I may yet fix it one day, because I could never just toss it in the trash. At one time I was thinking about ripping out the UMD drive and slapping a gigantic polymer battery in it, because a week's worth of battery is never a bad thing. Still have Pro Duo to SD card adapters laying around too.