You know what I hate? I hate when people totally disregard any sense of class when they step on an airplane. Especially in a premium cabin (like Alaska Airlines first class ). It's interesting to see people who are picking their scabs, or peeling off their toenails during the flight. I just love seeing when people put their smelly feet up on the bulkhead! I was once on a flight where the old woman behind me in 3C had soiled her adult diaper, and well, the salad didn't taste like just lettuce with the recycled air and all... I finally had enough when I was flying SNA-SEA on Alaska and the guy behind me took his bare foot and was scratching my arm with his toes. I finally told him to remove his foot from my armrest or I would do it for him.