Originally Posted by MrHarris
...but WoW's gameplay/ease of use has yet to be beaten IMO
WoW also has a huge community of add-on makers, and many of them can be used to really customize the UI, and overall look of the game. Even better, it doesn't breach the EULA, and there are a handful of really useful add-ons.
The other thing that makes WoW appealing is how the quests and leveling flow together. You can easily do quest after quest, each leading you into a chain or a new area where the enemies are around your level. Other MMO's I've played I felt more lost, whereas WoW really tells you where to go for your level.
There is a problem however with WoW's community (as with most Blizzard games). There's really some elitist nazis in there; who aren't afraid to call you out on anything you do wrong (or if it just differs from their opinion). Try playing any of the RTS games and being a noob. You'll get cursed at pretty bad.