Misery Loves Comedy starts getting interesting about 3/4 of the way through. It's not as insightful as the trailer leads you to believe; it's mostly just common sense observations.
Misery Loves Comedy wasn't as interesting as I thought it would be. There were a lot of "duh" observations like "comedians like to hang out with each other at parties." I'm pretty sure people of any profession probably have things in common and talk to each other at parties. I watched it in bits and pieces over a couple days, as I usually do with documentaries, and I'm definitely glad I didn't spend an uninterrupted chunk of time on it.
It's interesting to see the comedians, but there's not much that's really insightful. It actually started to get interesting in about the last quarter, so they should've done more stuff like that.
I guess they save the fundamental question for the end, which is "do you have to be miserable to be funny." And I think the answer is, not necessarily miserable, but you've got to at least have something to complain about. You never hear anyone making jokes about how everything's awesome and nothing's wrong or uncomfortable.