Do you have any particular class of every map?

I know most of us have a particular class which is our favorite one and some have all of them maxed out. My question is if do you ever get matched in a particular map do you always use a certain class? For example in my case every time I get to play extermination I always use my bulwark. I don’t know why but it seems to work well specially when as a team we fail to interrupt the majoris call outs. But most of the time I just try to play each of my classes equally