Do you think it is number of rpms per volt, per second = Kv?
One way I could look at it is like a gear ratio. Fewer turns would be a higher gear, like on a bicycle in top gear, you peddle slower but
your top speed will be higher. And same thing vice versa with low gears.
If you want a rock crawler or rough terrain truck with big tires, you want more torque, less top speed, so you would want a motor with
Higher number of turns. Street racer, lower turns (higher gear)
Anyone else want to elaborate on some of the other questions please do!