Your experiences may vary, but I will say there are two things I have never seen any truck driver do:
1) toss cigarette butts out the window
2) change lanes without signaling
I don't know if I just don't get out much, but 25 years of 4-wheeler-'in and the 5 years I drove OTR I never saw either one!
Drivers I have seen have always signalled their lane changes and I have never seen one toss a butt out the window...like I said I am sure some do but I ain't never seen it.
Little things do mean alot, at least to me. I am proud of the bulk of the drivers out there still driving.