unless it might rain or i'm parked under a tree or it's "sketchy," top down, windows up -- i worry more about door dings, and park accordingly (in order: as far away as possible, to the far right, then wider spaces, then next to slimmer, sportier cars [at 1.2 occupants per car average, odds are you will get dinged on your passenger side -- the driver to your right]).
i'm sure there are holes in my theory -- when the first ding or diet coke rolls on my interior i'll adapt.
