I'm afraid that I am at the opposite end of the spectrum. If check in opens at -2hrs then I am there at -2hrs and 5 mins if at all possible. I usually check in on line, but it makes no difference, I am alaways there WELL ahead of time. Drives my wife mad, so thats a bonus.
However in 15 years of doinf probably 100+ sectors / year, I haven;t missed one.
I have however spent an eternity sitting in airports, but thats another story.