A few guys I know aren't crazy about highway riding due to a higher potential for catastrophic situations. Personally I hate city driving. Stop and go, lights turning just when I'm up to speed and cars coming from every direction and constant shifting can become tiresome. Highway riding is much more relaxing to me. I can usually manipulate myself into a large buffer zone and everyone is at least going in the same direction. It's easier to avoid merging traffic when you have room to maneuver and easier to see and avoid distracted drivers when you have space around you.