He was just great really. He loved maths, and loved talking about it. But he was also very sensible. He realized that not everyone loved maths. So he was able to teach people very effectively to pass their exams if that’s all they wanted to do, but if you loved maths he would do such wonderful things and explain things in such depth that it made you want to learn more! He also supported me when I wanted to study Applied Maths on my own. Awesome dude. Thanks for your question.