Catching up on Saturday:
Favorite Elementary Teacher
My kindergarten teacher. I was nervous about starting school, and she was soooo understanding. I also think I remember her more because I had her and her DH as "bookend teachers" - I started with her in kindergarten and finished with him for calculus senior year. (I grew up in a really small town.)
Least Favorite Elementary Teacher...became a favorite!
When I was in 5th grade, my teacher left mid-year. We all had a favorite sub we were hoping would get her job...and she didn't. We got the one we were all a little scared of.

- But it turns out she was only strict as a sub because she couldn't rely on getting to know us. Once she was our "regular" teacher, she was
awesome! She used to take us outside for reading time and everything. We all ended up loving her!
Favorite Middle School Teacher
I had a math teacher in 7th grade who had the patience of a saint! - When you went to him with questions, he would give you just the right hints at just the right time, so you could solve the problem yourself. He built my confidence in math at a time when girls were not as encouraged to go into math as boys were, and I credit him with a lot of my attitude toward mathematics!
Least Favorite Middle School Teacher
At the time, 7th grade English, because she taught what I called "formula writing" for essays -
Tell 'em what you're gonna to tell 'em; tell 'em; tell 'em what you told 'em. - I
hated that, because it was
nothing like the stuff she assigned us to
read! - I felt like she expected us to be mediocre. (But it came in
really handy when I need to write a lot of papers quickly in college, and I forgave her.

)
Favorite High School Teacher
Soooooo many! - All my math teachers were awesome (and part of the reason I majored in math in college)! Plus a special shout-out to an English teacher who kept maps in her classroom and always made us look up the settings of the books we read. I had her for 11th grade and took my senior electives from her as well. - I learned as much geography in her classroom as I did in my history ones, and continued that practice as a teacher myself.
Least Favorite High School Teacher
Nobody I really hated. I had a history teacher who was pretty burnt out and we just memorized essays for his quizzes and then promptly forgot them, and a Chemistry teacher who made you do calculations the long way eeeeven if you were ahead in math and could do them quicker another way.

(I expect I frustrated him more than he frustrated me.)
Favorite University Teacher
I had a certain English teacher I really liked. He always took the time to make thoughtful comments on your writing, and just had a really chill, laid-back style. I took a couple different courses from him.
Least Favorite University Teacher
Freshman Calc - This guys really should have been teaching upper-level classes. Three of us had had high school calc (but not AP, so we couldn't waive out) and we took turns re-teaching his class in an empty room a couple of times a week to get the others through.