I think of it as more of a job(an awesomely fun job) as raid and co-guild leader most my wow time is just raiding from like 8 to 11-Midnight, so its not as bad as you think :P.
3-4 hours a night
5-7 nights a week
not even equivalent to a full time job. Plenty of time for Japanese, other games, and whatever else there is to do.