I like your idea Ike, floating islands sound fun. I believe there should be mainly small scattered islands with others of varying sizes, the larger they get the rarer they are. As for classes, I believe we should have less than you said, only Shieldmaster, Paladin, Rogue, Lancer, Ranger, Red Mage, Blue Mage, Priest, & Warlock. However all of these have a seemingly unlimited growth path for play styles. It should be so players of the VMMO do not choose any except their first class, then an AI observes their play style and automatically make changes to the character.