Hey guys I am thinking about getting a PSP again soon because well...d21lewis convinced me to do so with his thread. What do you guys think are the top 5 must haves for the PSP?

Here are my top 5 PSP games:

Jeanne D'arc
Final Fantasy Tactics
Metal Gear Solid: Peace Walker
PixelJunk Monsters Deluxe
Final Fantasy IV Complete Collection

would you guys recommend the YS seven games?

Its hard to list just 5, but anyways
in no order:

Metal Gear Solid Peace Walker
FF7: Crisis Core
Kingdom Hearts Birth By Sleep
Jeanne D'arc
Ys Seven

just 5 eh? hmm

Valkyria Chronicles 2!
FF: Crisis Core
The GOW games (unless you are getting the HD collection)
Duodecim
Tactics Ogre

Mmmm, simple!

1. Persona 3 Portable
2. Dissidia 012
3. MGS: Peace Walker
4. Crisis Core
5. Tactics Ogre

I'm getting Crisis Core today. I hear it's pretty good.
Of those I own:
-Valkyria Chronicles 2
-Final Fantasy Tactics
-Streetfighter Alpha 3 Max
-Resistance Retribution
-Hot Shots Tennis

I also wouldn't mind owning any of the God of War games. I'll be giving Jak and Daxter a shot, too. And don't forget all of the awesome PS1 games like Crash Team Racing, FFVII, Xenosaga, or Grandia.

I want Parasite Eve, too! And if there's a version of WWE 12 for the PSP this year (and not the 3DS), I may have to pick it up.

There is no "must get" for the PSP, there is nothing particularly memorable for me even though I've played a lot of PSP games, the game I spent the most time on is Birth by Sleep and then followed by VC2 though, even though I think VC2 is nowhere near VC1. 3rd Birthday isn't anything too special unless you are into Aya (which I kinda am,) God of War is not as good as the console versions. Though instead of playing those closer to console type games, I'd suggest stuff like Patapon or LocoRoco etc, those are interesting series.

square enix own psp
ff 7 crisis core
final fantasy 4 complete
dissidia 012
kingdom hearts birth by sleep
final fantasy 1 and 2
all must plays