Have a look at these links about British and American Humour:
http://www.anglik.net/britishjokes.htm (English jokes, website for EFL learners)
British humour vs. American humour
http://www.guardian.co.uk/film/2007/feb/10/comedy.television (The Guardian article)
http://ideas.time.com/2011/11/09/the-difference-between-american-and-british-humour/ (TIME article)
http://www.wlpf.org/ENGLISHANDAMERICANHUMOUR.htm (a little article)
http://www.economist.com/node/21528998 (The Economist article)
Now, what do you think about British and American humour? Which one do you prefer?