I don't think there's anything wrong with agreeing on most things as long as the people talking are easily distinguishable in their style or in terms of the perspective they provide on the topics discussed.
I mean, I could listen to Zach Lowe and Kevin Arnovitz talk hoops for hours, and yet they seem to agree on most things.
In general, in my opinion:
Sports Radio = Heated Argument (Hot Take City)
Podcasting = Detailed Agreement (add to common understanding)
To me an enjoyable podcast should feature personalities I enjoy listening to / spending time with, and the discussion should provide me with some info or insight on the topic I didn't have before, but I don't care if the people talking necessarily *disagree* in any major ways.
Actually, I see podcasts as a medium that should be a notable departure from the tenor of sports radio and twitter flame wars.
Podcasts are a little bit too static of a medium for heated debates, anyhow, especially when it comes to sports.