I always kind of felt that George Carlin’s M.O. was to tear down silly taboos and conceits that separated people from one another, as well as to give voice to some less than flattering impulses and inclinations that exist within all of us. He was a unifier, in that he gave people an excuse to laugh at themselves with each other. With some taboos and conceits, I would compare him to a dog playing with a baby rabbit. It’s true that the gist of his intent was fun, but just as the baby rabbit will usually turn up dead after such rough play, so (often) would the taboo or conceit in Carlin's hands.
More important than these things, George Carlin was funny: "Why do they lock gas station bathrooms? Are they afraid someone's going to sneak in and clean them?".
If we had a ladder big enough, I would volunteer to retrieve his soul off the roof, if only for one more HBO special.