I know some sign language, and I do find it easier to speak that way. But at the same time, you are expressing yourself. For me, that gets me more nervous than speaking. Because people are watching you and "judging" you based on your language skills. I never feel good enough to speak to a deaf friend, I always rely on his sister or writing, because I am too anxious to get a sign wrong. I can sign with no problems in front of people who dont know sign, but around people who are better than I am, I can't.