I'm getting mighty annoyed at this default response of "you're a mindless Christian drone who only does what the bible tells you blah blah blah". It's a lazy, insulting, cop-out response that has no place in a serious discussion, and with the frequency that it turns up, it's ridiculously hypocritical.
To everyone arguing in favor of their personal beliefs: using the same couple of responses does not look intelligent at all and makes a bad case for your argument.