I agree with Doug. I think all of us have a bit of OCD in us, it is just the degree of severity. I would say that I'm pretty obsessive about order and cleanliness, but not to the extent where it will disrupt my daily activities. I just have certain ways I like things... like how I set up the cockpit in my preflight, how I iron/starch my uniform, how I pack my bags, how things are arranged in the house, where I put things in the hotel room, etc... I just find the way I like things and the way things work well, and I stick with them. I figure it keeps me orderly, neat, and efficient. For instance packing my bags and where I put things in the hotel: Some friends will just toss things around, then end up leaving things behind. I put everything in the same place when I pack, and when I'm leaving I only need to look in a few spots in the room to ensure I have everything since I usually will put it in the same spot in each different hotel on a trip. Then there is my flight bag... don't get me started!
What can I say? I like order.