Addictive, yes. Fun, Absolutely.
There are ways to approach WoW and after 3 years of playing I have reached a pretty good balance. Know that you will NEVER get everything you want from the game. It would take too much time and energy.
Look at WoW as entertainment and not a game.
You will never "win"
Find a guild to play with
Set play time rules
Enjoy seeing the world
WoW is entertainment like a movie instead you live this one. The goal is to take part in as much as the world as you can. This way you can see the story unfold. Those that get addicted feel they MUST get every last piece of loot. Unless you have hundreds of hours set aside to do this, it will NEVER happen.