The Bulgarian perspective
The communist regime in Bulgaria oppressed the church for over 40 years, and to be a Christian and go to church was considered a really bad thing. Nowadays, nearly 30 years after the fall of the regime, a big chunk of the population are atheists, and communism surely contributed to that, although I can't say to what degree. In general, people here don't care whether you are an atheist or not.
Thanks for sharing the Polish perspective @agniese :)
Thanks, Dan. Sometimes I have the feeling that Bulgarians don't care who you are in general ;)
Yes, that's something I was considering adding to my previous comment :)