I am a chronic worst case scenario imaginer. Like, whatever I'm doing at that moment, I imagine what can go wrong and how I'd deal with it. Some call it pessimistic, but really I'm just trying to be prepared.
For example, right this minute I'm at a Panera having breakfast. I want some water but my crap is all over a table and my "always prepared" mind went to "what if someone stole all my stuff while I was gone". My first reaction? Yelling "hey! Can you at least leave me my flashcards? Take the money and laptop...just leave my flashcards please."