ovoon: Yea, backwards compatible PS3s can play P3 but not P4 according to a site.
Also, yea Persona 1 looks awful. And I'm talking about the PSP one.
I played P4 on my PS3 and I have an original 80gb. Always update your firmware before playing an old PS2 title, they were improving backwards compatibility all the time.
Anyways, I played a lot of P3P on my PSP, I was sucked into that game for a whole month or two of my life. I got into it in a way I never had with a jRPG before, I honestly felt like my character was me. The writing makes every little thing in the game so significant and fun. Eventually the game wore me out after playing for 25 hours. I only got to the 100th floor of Tartarus.
But once I was done with it I picked up P4, I was hooked all over again but it didn't last as long. The game was fun for all the same reasons and the new premise was amazing but the difficulty curb wasn't as good. I jumped into the dungeons and was immediatly kicking ass and taking names, but wheras I played P3P without grinding once I found I would be forced to grind If I wanted to make it past the boss I was stuck on in P4. So, I gave up after only 12 hours but I would still recommend it. I had more fun with these titles than most new games in recent memory.
I also give a slight edge to the premise in P3P, I felt like a teenage super hero. And that's always cool. I already bought the original's remake for PSP, I'll boot it up someday when I'm in the mood for a jRPG again.