Had a beard and specs when he tought me in the 80s and was neither liked nor disliked to be honest. He was a decent teacher but seemed short on personality back then. I suppose you could say that he looked like someone who could spend a lifetime in a laboratory and never get bored.
he can be really funny but i agree, he has really bad mood swings, one minute he will be really friendly the next he will scream at you for something really minor and then 5 mins later he will come over and apologise. really good teacher tho, teaches exactly what you need to know and is fairly easy to understand
he can teach but he needs to chill out!!! thers no need to scream at someone 4 lookin the other way...and boy can e shout!!
He scared me at first but I think if you give him 100 per cent he is completely different. He is the sort of teacher who can produce top rate future scientists if you've got it in you.