I honestly think I prefer mmorpgs when there is no "personal flying machine/mount". I mean it seems like a cool idea at first,
faster travel amazing scenery etc... But then in practice it makes the game world feel small, you don't see anyone on the ground ever and a lot of challenge when navigating the world is removed.
I remember the world in WoW feeling like the game world was so huge and there was this awesome sense of scale, but then with the really fast flying mounts and crazy amount of teleportation systems, you never really get to see the maps in detail.