I'd be interested, maybe, in seeing opposing political views or different opinions on economics, or something like that. Because I'm interested in those things and because I'm not very certain that my current beliefs are correct, when I even have a belief. Just today a friend introduced me to a good documentary that partially changed my view of nuclear power and I learned a lot.

However I wouldn't want to get stuck with something that is a complete waste of time, like creationism, or religion, or abortion, or something along those lines. Or something that just doesn't interest me, like, say, climate change or conspiracy theories.