I've been listening to a lot of audio commentaries since I started working from home (I'm listening to Undeclared commentaries as I write this) and something I've really come to hate is when the commentators introduce themselves as the other person. I'm sure it's sometimes awkward for people to sit in a room and talk about an episode of a show or a feature film but, man alive, if I hear that stupid ass joke one more time I think I'm going to shoot someone, or possibly myself.
Another thing that bugs me about the aforementioned style of commentary is that it is most often a room full of actors who will do it. Sometimes it'll be a director and actor, or writer and actor, but if it's a room full of crew, you never hear that. Directors, DPs, writers, producers, they all say their names and start talking about the process, the story, the lighting, the film. Actors (not all of them, I know) make the funny ha-ha I'm you and you're me gag then giggle to themselves like they're the first people to ever think of that joke.
I think I've hit my rant quota for the week.