At first I was thinking only as a Muslim but when discussing it with my friend who's Catholic she said she felt the same.
Instead of discussing the benefits of our chosen religions, our chosen paths in life (or right now, when discussing it with those who are not of the same faith or any faith we end up getting into debates about some of the things either a) people don't understand and thus take the wrong (often negative) way, b)other fanatics/fundamentalists/crazed nutters have done in "the name" of our faith c)how as a female we are oppressed in our faith.
There are countless other things that I feel I end up apologising for, or trying to justify; and I say justify because often, explaining isn't good enough!
Does anybody else find themselves in the same position?