I was excited to see an unofficial Atlus thread, as I've been a fan since Persona 2: Eternal Punishment on the PS1, my last big gaming love was Etrian Odyssey 3, and right now I am completely enthralled with Radiant Historia. One of the things that really stands out to me is just how likable I find Stocke to be, for a taciturn protagonist. Even my husband likes him- and he almost categorically dislikes macho silent male leads in games. Plus, the soundtrack is gorgeous.
Anyway, following Danicore's example, I'll list the Atlus titles I've played, at least as many as I can remember on half a cup of coffee:
PS1:
Spoiler
Persona
Persona 2: Eternal Punishment
Thousand Arms
Brigandine
Ogre Battle
Kartia
Hoshigami: Ruining Blue Earth
Rhapsody
PS2:
Spoiler Persona 3
Persona 4
SMT: Nocturne
SMT: Devil Summoner: Raidou Kuzunoha vs. The Soulless Army
SMT: Devil Summoner 2: Raidou Kuzunoha vs. King Abaddon
SMT: Digital Devil Saga 1 and 2
Odin Sphere
Grim Grimoire
Wizardry: Tales of the Forsaken Land
Disgaea (most of the sequels as well, but the original is my favorite)
I'm also a big fan of the Etrian Odyssey series for the DS, and I think P3P was my favorite version of Persona 3. I loved FemC.
Re: Catherine- I haven't run into her cameo yet in P3P, and I am looking forward to trying the game when it comes out, but I am ambivalent about some of the things I've read. We'll see, basically.