My councillor was a huge baseball fan - yes, it was the Cleveland Indians, but still a huge fan. After I graduated, we went to several Indians games, as well as their minor league games (this was in the late 1980s). He died a few years ago, but still led a full life.
I had a social studies and later history teacher who was great. He was excited about everything, and it showed. I see him at work every once in a while - even in his golden years, his passion still shows.
Then I had a Spanish teacher who was obnoxious and fun as hell. He bet another student the teen could not eat a hot pepper (200 chews), then sit still for 10 minutes. The student did not win the bet. That same student liked to copy my homework, then write it on the board for all to see. I also had the only English/Spanish book that had cusswords in it. Every once in a while, I would throw in a couple of choice phrases. Mike would write them on the board. Senior Ellis would crack up every time.
In college, I had an art instructor who loved to play Bob Marley all the time.
I could go on for hours. I had a lot of teachers and instructors who I thought were cool. Then again, I am a geek, so everyone is cool to me.