Ah the million dollar question.
Been a instructor for 2 years and got 50 students to their PPL.
Still have to adept to every new student.Everybody seems to require a slightly different approach.
I use all of the same material(lame jokes),just have to present it in slightly different ways with different attitudes.
Some people seem to need a quiet confident instr.(still working on that role)others benefit from a screamer(good at that).
As an instructor it's up to you to figure out what type of personality you have next to you and how to deal with them.
Obviously there about a 1000 variants.
Cheers