My family were a beige / C of E kind of thing, my grandmother sent me to an inoffensive Sunday School, all very calm and nice...
But when I was in the third year of senior school, I wasn't doing all that well, and so my folks sent me to a Catholic school for my fourth year.. good decision, it was a good school and I did much better... except...

It gave me a lifelong hatred of the Catholic faith. Bear in mind that the kids I was studying with had been brought up with that shit. They were used to it. Yet I was genuinely shocked by being shown graphic abortion videos at 14 years old because it was 'a sin against God'. Likewise, being put in detention because I said something, in some class or other, about sex before marriage being not a bad thing...
I just ******* hate religion because of those two years. I don't hate people who have faith, in fact I envy them somewhat, but it's not something that tickles my brain in a meaningful fashion.
And don't ask me about the thing with my Grandmother... now THATS a can of ******* worms...