Martin is a great teacher and an even better guy, especially as you get older. He understands very well what it means to be a schoolboy, relating to his pupils with funny insights and equally comical stories. Being a native speaker, he adds a certain authenticity to your French and is particularly helpful for oral exams. Thank you for a solid few years, sir, - I have learnt a lot.
Funny funny teacher, like him a lot. Don't really learn much thought with him, "Shirts, ties,collars and flies!"
Depends what mood he's in. If he's in a good one, he can be really funny, but if he isn't, he can be really annoying.