Who is the people?

I have a favorite lecturer in my campus. Now, I will explain about the person's general appearance and I hope you can guest it.

The person has receding hair. The hair's color are gray and black, but almost gray.The person is medium height and built. The person has sun-tanned skin, flat nose and around face. The person always uses glasses, wears stripes shirts and trouser. The person has mustache and chubby cheeks. When the person starts to teach, the person begins with prayer. The person always brings a knapsack bag. The person always says "so on" when the person explains the person's subject. The person always comes on time. I think, the person never comes late. The person teach me on Tuesday at 9 o'clock in K 15 room.

I think is all about the person's general appearance. I have given the key in my explain. You wanna try to guest the person? I'm waiting your answer.