Lufia 2 for me. Lufia 2 has great ending IMO. Well, actually Lufia 1 has a better ending, but Lufia 2 just beat it in everything else. It's not that easy either, with insanely difficult puzzle, but they are still manageable. Also, storyline wise, the game does not disappoint, despite being a prequel and anyone playing Lufia 1 know what will happen to the characters, the game never fail to evoke emotion, especially the ending.

Yup, Lufia is great. Though, breath of Fire is quite cool too... Well, yes, Lufia it is.