John Calvin's 500th birthday passed me by last week but I think it is worth a brief observation that he is probably the most famous Christian theologian I have never read. When I was at college there was a joke going the rounds. It was said that Calvinists didn't allow husband and wife to have sex standing up for fear that it may lead to dancing.
I think this joke told me everything I needed to know in order to make a concerted effort not to read him and to avoid any examination questions about him. A working knowledge of Luther, now filed under 'obsolete' in my compartmentalised brain, got me through Reformation History.
I seem to recall something about a theology of total depravity.
Maybe the late H.L. Mencken got it right when he described Puritanism as '...the terrible fear that someone, somewhere might be enjoying themselves.'