The worst person in the world to travel with is like a really egotistical know-it-all control freak hot head computer dork. Trust me.
No. I work in sales and I can tell you that egotistical know-it-all control freak hot head sales people are the worst to travel with. The trip home is the worst because you have to listen to some fabricated story of some hot chick they picked up the night before and banged in their hotel room.
Would rather your conversation to be about how Apple is evil, but Google is even more evil? Literally had ZERO in common with this guy. Couldn't talk sports, outdoors, politics, nothing.
ETA: One time this guy almost got us both thrown off a flight because he had put his bag (with iPad) in the overhead, and another passenger was trying to fit his bag up there and was kinda banging it around. Guy snapped, went from calm to hysterical in 1.2 seconds. Had to get in the middle and calm him down. Other passenger was like "jeez sorry man, didn't know."