valkyrie profile has the best battle system of all.

Deus ex/Oblivion but I'm sure you didn't mean FPrpg so i will go with Dragon Quest VIII. Although a lot of grinding I never got bored.

Baten Kaitos deserves a mention.

Another vote for Infinity Engine-based games.

Hmm, this is actually kind of tough. I really enjoy a wide variety of them. If we were to include srpg's I'd have to give nod to Fire Emblem, Disgaea and Final Fantasy Tactics.

For tradtional rpg's I'd likely go with FFVIII

For real time rpg's it'd be a tie between Dark Cloud 2 and Secret of Mana.

turn based gid system like enchanted arms and disgaea 3

The Legend of Dragoon and Shadow Hearts

1. From what I heard; FFVII introduced the Limit Break system, but I'm really attached to FFX because equipment didn't play too big a role. So probably a tie between those two.
2. Persona 4
3. Xenosaga
4. Dragon Quest VIII

Grandia 3's battle system is amazing