I've played SaGa Frontier a lot. I tried to play SaGa Frontier 2, but it wasn't as good, I thought. I also tried Romancing SaGa, but didn't like it much. I understand that the Final Fantasy Legend games for the Gameboy are actually SaGa games, and I honestly didn't like either of them that I played (1 and 3).

So it's just SaGa Frontier for me.