I love my PSP, then again I use it mostly for emulators and video. That may change with the flurry of new releases, though. It's true that there never seemed to be a whole lot of games for the thing but if you're coming into it now there's a decent library that's been built up and a lot more to come if Sony is to be believed. Just looking at the PS Store on it now reveals a boatload of games I'd like to try and if I had the memory I'd be racking up the demos.
The Minis section looks interesting, I'd like to see where that goes. It's true that there haven't been many "portable" quickie style games on the system, but that hasn't driven me into a rage like some people apparently have. Those kinds of games are nice to have but I found that I much prefer having fuller games most of the time. I had a DS which has tons and tons of those kinds of games but I always found myself bored with it in between Castlevania releases .
My only gripe is that I'm a whore for storage space and they don't make Memory Sticks big enough. I've got a good chunk of my DVDs that I had ripped for my iPod and was pleasantly surprised they play on my PSP (and much better if I might add, the giant screen helps too) and even with an 8gb stick I feel cramped. My 120gb iPod has spoiled me I suppose.