More than satisfied with the current game lineup, and it's only looking better and better as future titles are revealed.
Even though my original intention was to get a PSP for emulation, I ended up ignoring homebrew almost completely, and started buying PSP games.
I was mostly into the PSP games because I wanted some RPGs, but wanted something that went a little deeper than the standard-fare casual gamer stuff from Square-Enix, but ended up finding more and more as I gravitated away from the crowd that took GameRankings as the ultimate verdict for good/bad games.
Admittedly enough, I was a part of the crowd who thought the PSP had more ports than original content before doing research and finding out that the PSP's original content is keeping it's ports/etc to a miniscule minority. Now that I've gotten into the meat of PSP gaming, I actually prefer it a lot compared to the DS game library(GBA games excluded), and have even warmed up to give a few of the ports a try; it's been really nice to see how much extra content is put forth to make even the PSP's ports worth playing.
I'm at 51 UMDs right now (48 games, 3 demos) and I've been more than content with what the PSP's game library offers... lots of awesome niche/hardcore RPGs, lots of action titles and shooters, lots of strategy games, some neat puzzlers like PQ... there's also some car games and sports titles, but I rarely mess with those. It's not neccessarily the vast amount of diversity in the library that's got me hooked, it's that the games are so much more robust, challenging and feel like "the complete experience" compared to previous generations of handheld gaming that were so simple and seldom focused on an in-depth experience.
After being an avid PSP gamer for so long, the only thing the PSP's game library is lacking in are those little novelty games, which I honestly couldn't care a lot less about and I could just get for free as flash games.
Overall, I think it's game library is great. It doesn't have the quantity of sales needed to overtake the DS, but what PSP lacks in mainstream appeal/sales it makes up for in sheer quality.
