I never hesitated to talk about my religious background both with friends and others, because a lot of my decisions have been influenced strongly by my upbringing. It's a part of my personal history and I don't have any reason to hide it. It doesn't embarrass me a bit.
Mostly people are really interested and have heaps of questions, it's interesting when they find out how weird it really all is.
I found that to be true. People tend to ask me tons of questions about the WT. Many very interesting discussions resulted of it. People seem to appreciate the information and react quite shocked about the news, especially when it comes to medical questions (blood etc.). To me it seems there are still a lot of people who think JW are silly but harmless. It's an extra pleasure to me to get them to know better and it works as a warning, too. I hope they spread the news to others. (Speak of negative word-of-mouth advertising!)