So as part of a challenge if you will. 3 or more positive things about WoW.
The people first and foremost. Those we play with, talk to, laugh, cry, have fun playing a game that many cannot understand the appeal. They are what makes logging in an doing nothing except hanging out for an evening worth while.
The accessibility of the overall game. Sure there are parts that require a certain level of skill or willingness to work with others but there is so much more to do. There is enough varied content to appeal to a vast majority. Also their commitment to keeping it accessible to people with older computers or slow connections.
The story behind the game. While not necessary to play, knowing there is a story behind the why we do things makes it more enjoyable for me to play.
I could probably think of a few more. But off the top of my head those come to mind.