One, I occasionally have very long days where stopping legally might be difficult. It hasn't arisen yet (mostly due to good planning on my part), but if I have to, I want to be able to stop somewhere if I'm forced to without having to worry overmuch about where I am.
Two, I prefer to blend with my surroundings rather than mug folks' optic nerves. The only exceptions to this are during hunting season and when I'm on the bike (both times involve my "Don't shoot me!/Don't run me over!" orange shirt).
Three, I actually really like the M81 Woodland pattern. Yep, everybody and their brother has used it, either in the military or elsewhere. That being said, I really do think it's an awfully pretty pattern, even if it isn't the best disruptive pattern available these days.