I used to be a combination of Drill Sargent and Socratic when I was a trainer, about 20 years ago, in my other line of work.
Then when I first started teaching at culinary, I was still somewhat of a Drill Sargent, but as the years went by, I honed myself to teach people in a classroom who were of different age groups, life-styles and with different past experiences.
Now I am more of a combination of Socratic and Dead Poets. But at certain times, I think, depending on the situation and the needs, the Drill Sargent comes into play and is effective in situations that require it.
Observing other instructors in their classrooms is a very interesting and valuable tool as you see what to do and what not to do.
We never stop learning and recording yourself teaching is also a great learning tool.