My wife and I spent some time reminiscing about teachers we have had in our lives. The detail we can recall is astounding. We have such strong opinions, memories, and characterizations of our past teachers (both positive and negative). Neither of us had any difficulty in remembering any of our teachers, from Kindergarden up to University. I can remember each of one of them. I can remember their strengths, weaknesses, the times in which they helped, and the times in which they did not. I am sure you have similar opinions and thoughts of your former teachers.
Remember this the next time you stand in front of your students. They certainly will.