I don't listen to him (don't listen to the radio at ALL), but my old college roomie would listen to him all the time. The dude is F'ing FUNNY. Holy crap the unadulterated madness that spews out of that man's piehole is astounding. He has quite the sharp wit on him. I liked when he did the Carl's Jr. Commercials; those were great.
Even better were the callers. Half of them would talk just like he did and have the same pompous, opinionated trash-talk.
Classic quote:
"And OH MY GOD, what is UP with that dude's FACE? He looked like he fell out of the damn ugly tree and hit EVERY BRANCH on the way down!"