I would highly recommend the Mega Man Battle Network series, while it's a bit of a dark horse in the MM franchise, they're my personal favorites. MMBN3 is classic and has the best storyline, I also like 5&6. Some people like 2, but i wouldn't bother with 4 or 1, they aren't very good. If you like a action-based RPG with a kinda different battle system and a cyberspace setting, it is really fun.
HOWEVER avoid Star Force. It's not nearly as good. BN is muchmuch better.
I'm currently entangled in Final Fantasy I & II Dawn of Souls, and I LOVE IT. If you haven't played these games, I would recommend them.
I also have Circle of the Moon, I'm stuck on the Necromancer, and too lazy to grind against mummies.