Honestly? I think you could run DDO. And if you want my opinion, you should play Runes of Magic (on a PvE server).
Flyff is just a game where you grind until the last level. I used to love flyff back in the day (LOVE IT), but really you just grind and grind from monster to monster until you reach the level cap, and rebirth or something into a new class. I have heard horrible things about the recent patch as well.
I would say give Runes of Magic a try if you can run it. It's really a fantastic game.