Final Fantasy 11 on Ps2 - my 1st MMO..endgame was just too time consuming for me, game has not died yet, its actually doing better then the sequel.
DCUO on Ps3 - quit because of the extreme menu lag and non existent player communication. Almost noone has a mic or keyboard. Love DC tho...
WoW - Stopped playing because Cata introduced exactly nothing new to the game. WoTLK might just be the pinnacle of that game, at this point they are feeding off the fact that there aren't really any other theme park alternative mmo's with the same polish, Rift included. SWTOR and GW2 poised to challenge this.
Darkfall - awesome game, great ideas. UI is a nightmare, macro vets wearing full plate armor, swinging 2 handers, shooting arrows and casting max level offensive magic are ruining the pvp. Also lag issues in large scale battles, server side.
SWG - arguably the best sandbox game ever created pre-NGE. played until THE patch then quit for WoW. If im gonna play a theme-park might as well play the best one. Company pride/ego preventing SOE from releasing pre-NGE servers that would explode with players overnight. Biggest travesty in video gaming imo, from the artistic/vision p.o.v.
AOC - Terrible grind, lackluster quest system, missing features at launch, dull instances, dull classes. It does sport a wicked cool fatality system I wish more games would use though. Graphics are still the best out there I believe, even with Rift out.
Warhammer Online - Great game on paper, Mythics presentation...not so much. Still server side performance issues all these years later, unbalanced classes, endgame promise of capitol city invasions ( the games highlight ) was lol at best and recently was changed into a 10v10 situation?....
Rift Beta - WoW with portals that open up and spew mobs....ya im gonna spend 60 bucks on that....sure. By level 12 I uninstalled the game, it felt like I was leveling an alt in WoW.
EvE - solid game with plenty of sandboxiness, maybe the best sandbox out right now since the demise of SWG. Not having an avatar makes the game feel....detached somehow. Incarna expansion will solve this problem and flood the server most likely, but its been "on the horizon" for years now.