Odin Sphere is much better than GrimGrimoire imo. GrimGrimoire is a really neat concept, but the execution is rather cluncky and it's just not that interesting. It has potential to evolve into something great through sequels and such, but it's just not in the same class as Odin Sphere right now.
As for other recommendations, why not give a list of PS2 JRPGs you've played? If you're a JRPG fan, it's likely you've already played some of the most obvious games to recommend.







