Iv tried ALOT of mmos.. and hands down to EVE.
when you get into it EVE is a great game, and I enjoy the advanced playstyle.
Its also the only real mmoRPG. Iv never delved into my character more than in EVE. Because only your characters actions define who youi are, and the possibilities are endless.
Its also one of the most relaxing mmos, when you just fly around in a spaceship, exploring with probes, mining, or just flying.
Second place is WoW, got a couple of 85s, yes I pay for both EVE and WoW, cause they can be played at the same time.
Third place is Guild wars me thinks, and fourth place is warhammer: age of reckoning.
- Fifth place is world of tanks if you count that aas an mmo xD