I think a lot of things make a good teacher. Since different people have different preferences as to what they think makes a good teacher, you have to be able to adapt to each student's needs and learning styles. So I guess adaptablity and approachability are the most important traits. Having approachable teachers have made a huge difference in my learning. I'm not as afraid to ask questions which can be scary or talk to them which makes me want to learn more and be more invested in the class. Being able to adapt to unexpected circumstances as for an entire class, like what we're doing now, or adapting to an individual student's circumstances and learning/knowing how to help them best.