Another stupid WOW question

Is it possible to play wow 5-8 hours per week and still enjoy it? Or is it not even worth it then?

I love MMORPGs but don't want to devote 40 hours a week to it. For some reason my gf wants to see me sometimes and my boss wants me to show up to work.

Fuck I play 3-4 hours a night most of the time because I live with my friends and we all play the game.