I like the format that he uses, and the transcripts are pretty decent if I want to revisit later to see what someone said.
Some of them are better than others, but given the sheer number of interviews that Andrew does that's inevitable.
What's your issue with them? Andrew reads HN, maybe if you offered some feedback about what you didn't like he could take it into consideration, instead of just saying that you hate Mixergy for some unknown reason. If anything, he's shown that he constantly modifies how he does things, perhaps you can raise a point that he hasn't considered previously.
My problem with Mixergy is that there's a ton of enthusiasm and it gets to be a bit much. The design of the site also screams "I will show you how to make money online", and is a bit of a turnoff.
and extra points for transcripts.
A lot of the content is inspiring and very good for idea generation