Then you’ve got the party boys, often 20-something hostel-hoppers who are strictly looking for a good time. They can be a lot of fun. But a one-track mind (and I’m not talking about sex, I’m talking about booze) can definitely be annoying.
I was on a flight that turned out to be overbooked, so a group of us had to fly later. There was one guy who struck up a conversation about it, and eventually invited me for beers at the airport bar. But then it turned out two seats had opened up from people not showing up. So him and his friend jumped up and elbowed through a crowd of families and senior citizens to get to the boarding gate first. Very gentlemanly.
Guys sitting next to me on long-haul flights have offered me Xanax and OxyContin on two separate occasions. They seemed (fairly) normal. But to this day, I still don’t know if they were being friendly or trying to molest me.