As much as I like commentary tracks, whether or not they're entertaining depends on who's doing the commentary and how much they have to say.
Oh, I agree completely; I'm just saying that, in my opinion, the collective Futurama commentaries are entertaining indeed. The subject matter and commentator lineup both vary widely as you would expect (although the presence of Matt Groening and DXC are pretty much a given each time), but as I remember them, all of the commentaries offer both cool information and laughs in various amounts (I think it's safe to say that they're funnier when John DiMaggio or Billy West are contributing, but they're good even without those two). There's rarely a dull moment.