I'm suprised so many tuck them in.

I've always left my pant legsout, and then secure them around my boots on the outside. It keeps the rain and dirt out of my boots. This past weekend it rained on me all day, and I had to walk over a mile through tall weeds, to get to the stand. I couldn't imagine having my pants tucked in, in those type of conditions. My feet would feel miserably wet with weeds and dirt, unless I had the "Overhang Roofing" effect, by leaving the pant, over my boots.