I think it's safe to say, driving a truck is similar to any other employment, as there are some good employees and bad ones. I don't know if there is any coorilation between the guys that drive truck for a company, or own their own truck, but I've seen good and bad. They do tend to get over to the slow lane, more often at night it seams, but you'll have your occassional ass bandit that wants to ride a few feet ahead of another semi in the next lane and block traffic for miles. On my drive down to Mardi Gras in February, I was getting off the Interstate to get onto another highway, and the semi behind me taps the back bumper of the 01 Mustang GT I was driving at about 45mph. Talk about a scary feeling, and the guy with me that owned the car wasn't too appreciative of the mark it left. But that's not to say I hate all truck drivers.
Mark