Does Fire Emblem count?
If so (in no particular order):
Any Fire Emblem game, they're all so good.
Dragon Quest IX, I also really like IV and V, but IX wins it for me.
Any Pokemon game, they're all so good.
Dragonball Z: Attack of the Saiyans (awesome game that not many people know about).
Secret of Mana.
If Fire Emblem doesn't count (again, in no particular order):
Dragon Quest IX.
Any Pokemon game.
Dragonball Z : Attack of the Saiyans.
Secret of Mana.
The Last Story.
I also very much like the DS remakes of Final Fantasy III, IV and Chrono Trigger. Never got into Mass Effect, reminded me too much of Star Wars Episode 1 (kidding). Oblivion and Morrowind are both great, Kingdoms of Amalur is good. Paper Mario and Mario & Luigi are also great series. But the 5 listed above take the crown.