Commentaries can be a mixed bag. Sometimes they're really entertaining, sometimes they're slow and boring.
But do you listen to them? Which ones have you really enjoyed and which have bored you to tears? Are they even a good idea bearing in mind that a lot of Who material is very old and the participants even older with dodgy memories.
My favourites have to be the Peter Davison ones. There's always a fun vibe to them and Davison always does his homework by watching the story ahead of time. I think a lot of the 60's ones can be a bit clunky, especially when the participants can't remember a great deal about the production. But my least favourite so far was Talons of Weng Chiang. Given that he produced some of the finest who ever, Phillip Hinchcliffe is the dullest person to listen to ever.