That's funny you mention it, because one of my favorite teachers was my 3rd grade teacher too! I can't really fully say who my least favorite was. I usually at least liked my teachers... I guess if I had to say one, it'd be my shop teacher in 5th/6th grade. He was always yelling at me for being too quiet and it sorta scared the poop out of me. I loved most of my other teachers though. Best history teacher ever in high school.
I feel like this could be a thread topic all its own o.o In fact I think I'll go make it. Because it'd be helpful for me in general! xD