Think of your favorite movie character (the character themselves, not the actor). If you boarded a plane to find yourself seated next to this character, how would you react?
Seriously, I think most of the characters I like are people I would be very, very worried to see sitting next to me on a plane - for a variety of reasons!
This is the correct answer. All of my favorite movie/TV characters are conveniently attractive, so... yeah. Would try to have sexy times, regardless of which character (protagonist or villain, male or female).