A lot of the time, I found myself Teaching topics In loved, to a mix of (1) students who did not want to learn the stuff---or did not want to have it presented the way I was presenting it, and (2) students who were happy with the material, and mostly OK with the presentation.  Some of the time I tried to 'sell' the material to the entire class; some of the time I focused on those who were enjoying the lesson, basically writing off the dissatisfied ones.

I tried to be creative with the exams I gave; I made sure that they believed that I wanted to know what they knew, as opposed to what they didn't know.  I worked hard to make sure that all of them could answer a core of questions correctly, so that I did not have to grade out of, say, 40 points, and then add sixty to their score!  (There are teachers who do that.)

One course that I enjoyed teaching---for the most part---with every sort of student, people who hated the subject, and those who loved it, was Geometry.  Only students who were pre-service (going into the teaching profession) were expected to take this course, but word got around that it was an easy course, and other sorts of (non-teacher) types got onto my roster, and I let them, hoping they would learn to love mathematics.

So, to summarize: with a topic that I liked, with eager students, and where I had some latitude regarding the curriculum, I was in heaven.  In all other cases, teaching was somewhat of a chore.

Arch.