If the evaluations give articulate suggestions on how to improve, then, by all means, take the suggestions and try to improve. But don't try to change who you are to make yourself a different teacher. Some are impeccably organized. If being impeccably organized will make you feel dull, then don't do it. Do, however, indicate to your students that you have a plan or an outline in mind. Similarly, if you don't want to take road trips while you are teaching, then stay on the highway. Students can smell a fake. Be sincere, whether or not you mean it.