Opinions are divided on this question. Some students may like elderly teachers' teaching because they think elderly teachers have more teaching experience and that they tend to be patient and careful with explanations. However I prefer to be taught by young teachers. Firstly we students have much in common with them. So they are our friends as well as our teachers. Secondly they are more .energetic and enthusiastic. Usually they can make their classes lively and interesting. Besides they are more ready to accept or create new ideas including teaching. Thirdly most young teachers devote themselves to their work making them teach creatively and effectively.
In a word I prefer young teachers to elderly teachers.