Do not want!
Land scape trucks.
All those sharp long implements, bouncing around ahead of me on the highway. Mind you, we are all going at least 75 mph and I keep thinking something will happen and all those tools will bounce up and fly at me like spears.
I can handle most any other truck, but landscape trucks are the worst! I avoid them like the plague.
They give me the shudders!
How about you... what do you hate to ride behind?