Harmony 
Okay Gypsy here's your input.
I don't have a PS3 so there's actually a few I haven't played like Xillia or Vesperia. And although I can emulate the likes of Symphonia I never bothered because in all honestly the game looks like shit. However, based on the ones I have played:
God tier: Tales of Destiny remake (PS2, JP-only)
Very good tier: Tales of Graces (Wii, PS3), Tales of Rebirth (PS2, JP-only)
Good tier: Tales of Destiny 2 (PS2, JP-only, *not* the same as Eternia), Tales of the Abyss (PS2)
Okay tier: Tales of Hearts (DS, JP-only)
Ehhh not too bad I guess tier: Eternia, hasn't aged well but it's still somewhat decent.
Fuck this shit tier: Phantasia (the earliest iterations on SNES and PSX), I'm sorry but it didn't age very well at all.
In short by not playing the JP ones you only miss out on the very best the series has to offer.
