I don't mind 2D iso/platform side scrolling but prefer in the case of MMORPG's 3D action along the lines of Phantasy Star (Which is why I always mention it). PNCers bore me out real quick, even if I like the game and it's features. That's probably one of the main reasons I keep going back to playing Maplestory all the time.

To be honest though I'm not overly impressed with the action mmo's we got out right now (It kinds seems that way for most people seeing as everyone is waiting on the next wave). Dragon Nest ain't bad though and neither was GhostX or Dragon Saga and some of the others but a few were just outright disappointments (Fantasy Earth Zero).