One of the biggest fights Keegan and I have ever been in involved a long car trip and control of the car stereo. We have pretty vastly differing taste in music, and it can get ugly. Also, I'm a singing along kind of person, and that drives him crazy. Given that we're going to be spending 20ish hours in the car together over the long weekend, we've pretty much come up with a "one hour of your music, then one hour of mine" agreement, with the other person having veto power if there's something we absolutely hate. And I'll try to keep my singing along under control, but there will still be some. I just can't not.