I like the battle system of FFX. It was the first video game I ever played (it's still the only one, along with FFX-2!). I had hated everything about PlayStation and all that "video game crap", but along with loving the game, the battle system suited me. It didn't require any physical skill, just logic. I also enjoyed the one in FFX-2 because it was a bit more fast-paced and rather addicting.

I also liked the sphere gird system in FFX ^ ^ I know most people hate it, but I got the hang of it really fast and I though it looked neat...