Peculiar Habits

Perhaps I should say eccentric. I have noticed that when I go to the Stop n' Rob to buy gas, I tend to leave my keys in the ignition whilst I go in to pay, whereas when I venture to the very same Stop n' Rob to purchase something besides gas, I never leave the keys in the ignition, even though I generally am able to park right by the door, rather than thirty feet away at the pumps.

Am I the only one who does this?