I'm 28, have them all on DVD, and a few months ago, started watching from the beginning again.
Tim permits about 3 or 4 episodes a week, some weeks less, some more, but the plan was every night at first.
I'm halfway through season 3, and gotta say, every disc I'm popping in now, I'm amazed at how 3 out of 4 of those episodes are fantastic episodes, why I'm a fan, while the other is still really good. Season 3 is rockin'!!