Most of my discussions revolve around physics, feminism, politics, or fantasy and sci fi books and tv. I like to have long and winding discussions that occasionally go off on tangents about any of these things, or any number of other things if they're interesting as well. I'm not very good at staying on one subject, even when I'm arguing, so if you're a very focused person and I go off track, just nudge me back on track. I'm pretty easy going.
I also quite like going out and exploring interesting things. I think most things can be interesting when seen in the right light and with good company, though.