To be honest, I like it when I hear interviews with people I know little or nothing about as everyone has a different perspective on the subject -- though I am personally more interested in design and development than publishing -- so just keep 'em coming! :)
As for subjects, well, each interviewee brings their own interests and obsessions, and that is good for me too.
Come to think of it, though, I feel discussions about failure and lessons learnt are often the best. I fail a lot, sometimes in ways I can get past and sometimes in ways that totally bury the game. I also need to fail a lot more before I figure I've "done my dues". And I expect that if I get to be "successful" (whatever that means) I won't stop failing, I'll just hopefully do it a bit less and learn a load more each time. But it can be disheartening, so in a bizarre way it is good to hear from people I admire about how they ran into problems and how they dealt with them -- or didn't. A lot of people do talk about this sort of stuff, and I would love to hear even more!
(And no, it's not because I like hearing about good people failing, it's because stories of overcoming challenges are the best stories.)