Only when I travel alone: I enjoy playing the game of being perfectly on time.
Just enough slack to time my arrival at the airport so that I can take a leisurely stroll to be the second to last on the plane, never having to stop and wait in a queue.
It has been close at times, where the leisurely walk becomes a bit of a huff and puff.
I have never missed a flight, and will never play this game when it has consequences for someone else.
And, it is deeply satisfying to judge the journey accurately.