Tales of Symphonia
An RPG for the Gamecube produced by Namco. Has an awesome battle system and tons of length. A fast-paced adventure illuminated by very lively and lovable characters, plus an involving plot that is absolutely GREAT if you love twists. This game does not receive the true glory it deserves.

Each character in Tales of Symphonia is a masterpiece in all aspects, including dialogue, the relationship/affection system, voice, and design. Except Colette *cough* (and especially Mithos, Kratos, Raine, and maybe Lloyd...? His voice, Scott Menville, is very good). 

Basically, ToS is much more deep, memorable, and especially fun to play than similar Japanese RPGs (e.g., Final Fantasy or Grandia, which to me are SACRED enough already). Everyone should experience it.
"Tales of Symphonia means everything to me. I'll revert this whole world to nothingness."