Eddie Izzard is my favorite, easily. I saw him mentioned earlier in this topic and someone also said they don't like British humor, so they don't dig his stuff. British humor is hit or miss with me, but I love Eddie Izzard. On the other hand I can't stand most Monty Python stuff, and I rare laugh when my friends try to get me to watch The IT Crowd or The Young Ones. I think instead of being "British" Eddie Izzard's humor is more based on linguistics, history, and literature. If one has an interest in any of those, they are more likely to enjoy Eddie's material.
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