I find I always leave the car in gear if I park. Usually 1st but if I'm on a steep "down" slope I would leave it in reverse? Any logic to my thinking?
Also bit OT but if you ever are driving through water (ford... or drift as we call it in south africa...) Dont park up and pull the handbrake and leave it for a few days. This happens to many hikers where the brakes will seize and takes some fiddling and knocking and mcguyvering to get the handbrake to release again... Or it could just be that the car loves the outdoors so much it doesnt want to leave