I've been going waaayyyy overboard with PSX and PSP games ever since I finally got around to hacking my PSP. Just to name a few:

Gods Eater Burst (Monster Hunter without the clunkiness! Hell yeah!)
Valkryie Profile: Lenneth (Very unique rpg, par for Tri-Ace's course)
Star Ocean: Second Evolution (Same as VP, very fun, awesome characters)
Parappa the Rapper (Grand-daddy of all rhythm games, hard as HELL but fun)
Legend of Dragoon (Very slow and plodding so far, but seems to have great story)
Threads of Fate (Generic animu-style jrpg, but unique combat system)

Many more to come. Good grief do I ever need a bigger memory stick.