I recently had a flight, on way out sat next to a woman my own age, she went on (at 7 AM) to down two small shot style bottles of JD.. this made me feel very ill. She went to the loo twice. Luckily she was aisle seat.
On way back i sat next to a gentleman who must have been at least 70 with a book. He was in aisle seat. He was very polite, didn't affect me once and he smelt rather pleasant so he wasn't in any way at all bad to sit next to, quite the opposite, a role model of a plane passenger. I'd rather all the peeps on the plane, bus and other public transport to be older. More aware, respectable, educated and considerate for others positions due to life experience and trial and error may we say.