) so no, I don't talk to strangers on a plane very often. I've always got a family member with me, so we talk to each other or we both read. If there is a third seat and someone is sitting next to me I will smile and say hello, but that's about it unless they ask me a question then of course I'll answer, but if they "seem chatty" I pull out my kindle and start reading. I just don't get into small talk with strangers. I don't care where they're from, what they do for a living, how many kids they have, yadda yadda yadda. 
YHey if i didnt talk to people on planes i wouldnt have been invited to stay at a man's home in Barcelona.( when i was 21) so i suppose back then they wanted to talk to me.
I was bummed!