I CAN be level headed but I ALMOST ALWAYS get carried away, is this a bad trait to have?

I believe that this trait is very useful, but, as all things do, it has downsides. I can relate to some of the things you have described, being objective and frank sometimes works way better then being a little less harsh. Saying what you feel, and lashing out can help you show your real self, and make boundaries that others did not know existed. But I believe that this is a good policy to live by, "If they can't accept you at your worst, then they don't deserve you at your best." Its a wonderful trait to poses, and many its rare to see, and own.