I thing it is very important for teachers to understand, as well as have an interest in, the subject they teach. For a teacher to be effective, they must have a clear understanding of the subject matter they teach to their students. Teachers will not be effective if they do not know the material. I remember teachers who were respectful to their students, and in return the students usually respected the teacher. I think you should always show the students you care about them and respect them.
Common sense is something that is common knowledge to most people.
If teachers lack theoretical knowledge, it forces them to use common sense when making classroom discussions, which is not always the best way. I believe planning and preparation is very important for developing decision-making skills. Being prepared is always an important part of my teaching. The most important teaching skills I could learn would be the ability to diagnosis student needs and their learning difficulties. I believe this is a very important part of teaching.