Tales of Phantasia
Tales of Symphonia
Star Ocean
Star Ocean 2
Super Mario RPG

Because all of them, need skill, timing, and good reflexes to battle and play well, as well as having a pretty absorbing storyline and likeable characters, with a relative amount of depth. Well, less of the character side on Super Mario RPG, but it was still quite a lot, especially with Mallow.

All I can say is Namco, Wolf Team and Tri-Ace > You

And Lunar : SSSC is pretty damn hard, yes, but I'd say Eternal Blue is harder for the Dragon battles, especially the black dragon. WAY TO BE RESISTANT TO PHYSICAL ATTACKS, THANKS FOR THAT.

The final boss was kickingly hard too, and then the epilogue, oh gawd, that was difficult.