Familiarity breeds contempt. Yep.
How many of the frequent fliers listen to the safety briefing/read the cards? I know many do, and hats off to them. The rest of you "I've been on a 7x7 a hundred times, so I can read my newspaper instead" are a problem.
Not every aircraft of the same type is the same. Do well to remember that.
I always count the seat-rows to the nearest exit I might need. Having done plenty of training evacs, can tell you that smoke is kinda difficult to see through.
And as for kids/elderly/overweight/disabled at an emergency exit ...
