Henry VIII Alternate History
A typical dinner conversation at our house:

"How was your day, dear?"
"It was okay. The baby slept some. Say... besides the fact that Henry VIII was a lecherous lout, do you think Katherine of Aragon has any culpability in the break from Rome?"
"Well, if you put it that way, the Pope had something to do with it too. Technically, granting annullment would have been seedy, but wouldn't have been out of the question."
"Well, wouldn't it be interesting if there were an alternative history role-playing game [not that I'm into RPGs] in the courts of Henry VIII?"
"Sure, and Henry VIII could be a polygamist, and all 6 wives would be alive at the same time!"

It only gets sillier from there on out. However, if you are interested in alternate history, here is a speculative essay for you to read by the historian Alison Weir (see above link). Also, if you are looking for a short, good biography about Elizabeth I, take a look at Behind the Mask: The Life of Queen Elizabeth I, by Jane Resh Thomas.