I have cackled out loud at this thread perhaps more than any other. Lovely reading. Has certainly made me appreciate my generous, relaxed PIL and, um, relatively normal parents more than ever.
That said...
MIL, a woman who has survived a murder attempt and spent her working life in an extremely challenging environment, refuses to drive outside of her home town in case she has to turn right.
FIL once sulked for the rest of the day after I refused his very insistent offer (made while we were eating lunch) of some tinned sardines made by the firm he was working for at the time. He is one who has improved massively since retirement!
DDad cannot countenance travelling by public transport. He must come in his own car. This means he and Stepmum will turn up two hours late for lunch, having fought their way across South London. He will be beet-faced and furious, swearing about roadworks, traffic etc. My dad has lived in South London all his life and driven all over the place for work. Roadworks and traffic should be no fucking surprise! However, should I suggest they get the train, he will visibly recoil and spend 20 minutes telling me how shit and unreliable they are.
The one exception to this is his annual trip into town, to Fortnum and Mason's to buy his Christmas pudding.
Love him really, however when they come for lunch now I make sure I ask them over two hours earlier than necessary so that DC are not crying/fainting with hunger by the time they arrive :)