I'm new to the site, but thought I would jump in since I love RPGs!
Grandia - This is a really underrated game with an excellent combat system and a real sense of adventure and fun that has rarely been matched. I really recommend it.
Persona 3 FES and Persona 4 - I like the combat system a lot and the characters and story in the Persona games are easily some of the best in any RPG. The social links keep the gameplay fresh too.
Final Fantasy 7 - This game is the one that got me into RPGs and I love the game in spite of any faults it may have. I've played it more than any other RPG and I think I've secretly hoped that every Final Fantasy I've played since is as a good as this one.
Final Fantasy Tactics - Easily my favorite strategy RPG of all time. I love the challenge of the gameplay and I think the story is strong too.
Honorable Mentions - Chrono Cross (Haven't played it since it was new and while I remembering loving it, I need to play it again to know for sure if it belongs on this list), Dragon Quest VIII (Very fun game/adventure, not quite one of the very best RPGs in my opinion though), Kingdom Hearts 1 and 2, Final Fantasy X and X-2