I think it's okay (and polite) to adapt to "the herd mentality" while taking a class.
The instructor is attempting to convey an idea or technique to several people at one time. It seems to make sense to me to at least try it the instructor's way - for a while, anyway - after all, one paid money to do so.
Change it out or change it up after one gets home.
I do understand wanting to be individual - but - give the instructor a break!