I have been a mentor for student teachers for a number of years now, and I always enjoy working with student teachers. Although I have been a professional mentor in schools, I much prefer being a subject mentor. I find that students make me reflect on my own practice, and they always seem to ask searching questions about why i have done something in a certain way.
It also makes me realise how far I have come as a teacher in my time in the classroom, how much of my teaching now just comes as second nature.