Had a "wonderful" flight back from JFK on BA when I had the joys of sitting beside someone who obviously ate a lot of curries, which was obvious because he had "curry-flavoured" BO. Not fun
Then there was also the trip back from Chicago which involved having someone who needed a seatbelt extension and was a god-botherer to boot. And, in actual fact, he was not a problem in the slightest, one of the best behaved people I have ever been sat beside.