Well, I will admit that style is not the only reason for my hairstyle( Regulation "High and tight", very short,maybe 1/2 inch flat top on top, sides and back shaved almost to the skin).....But besides the fact there's no question as to whether this style is within military grooming standards( I'm in both the MA State Guard and the Civil Air Patrol), it's easier to maintain, plus there's basically no chance of it ever being grabbed in close combat( the very reason, in fact, that the military, and now, many law enforcement agencies, encourage hairstyles of this type).
I've taken to wearing BDU pants as regular pants just because after wearing them as part of my uniform, i find them more comfortable, useful, and more to the point, far longer lasting than jeans( the ones I wear in civvies, though, are never in a camouflage pattern, always a flat color( olive drab, black, khaki, blue and so on). Loose enough to run/kick, tight enough not to snag on any protrusions if running, pockets to hold all sorts of weaponey/ first-aidey goodness if need be