It's really difficult to say because all of America wont think the same way about British humor. From what I've noticed, I find British humor a little more witty...
I like it. Some of my faves are the Monty Python movies, Fawlty Towers, This Is Spinal Tap and there was a British show a few years ago about a guy who managed a health club (really funny)
I personally love most of the british humor that I have seen. I love monty python and shaun of the dead and death at a funeral. I think that the british are way funnier than americans!