Wanted: good PSP games

[Sneak]

Alright. I was given a PSP a while ago as a gift, and it hasn't seen all that much use (except for lately).

So, I'm trying to find some good games to get for it. I'm thinking about getting Valkyrie Profile (never played that one before, but sounds really fun).

Games I currently own for PSP:
-Lego Star Wars 2
-Metal Gear Solid: Portable Ops
-Daxter
-The two sports games it came with (FIFA and MLB)
-And...yep, I think that's it. Poor PSP.

It seems like the PSP game library is somewhat lacking, but I may just be ignorant (well, I already know I am, but I'm not sure if I'm ignorant in this subject). Feel free to enlighen me.

[That Lanky Bugger]

Try these:

Metal Gear Solid: Portable Ops
Valkyrie Profile: Lenneth (if you missed it the first time around)

After that, I'd suggest the following:

-SNES9x for PSP
-As many ROMs as you can get your hands on