Drunk senior citizen who would enter his seat next to me by basically falling into it, causing the whole aisle to jolt when he made his landing.
Little kid playing a touch video game on the back of my seat for three straight hours (while his mom was sitting next to him).
Shoeless guy. Not much more needed to add to that.
Best seatmate? None. What better feeling in the world than realizing you're sans neighbor for the flight and you're about to enjoy the chance to stretch your legs and nap horizontally. Oh, the small pleasures while traveling.
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