I'm 24, work full time and my schedule is so fucking random I never know what to expect.
Still able to raid late night with guild, do RL shit, etc.
I mean really, you get like 7+ hours a day to do whatever you need after getting off work at which point it will be most likely 12 AM if you work the day shift. Most people get off work around 4-5. I get off at 5.
How do you not find time to play WoW with over 7 hours? Terrible time management obviously. All you need is 8 hours of sleep, and we're not even talking weekends here!