I think there are lot's of masochistic guys even more than sadistic guys, they may be not juts that active.

I am more on the switch side and will tolerate some dominant girl but will not behave like a total doormat.
if she is willing to take initiative that's great but I also can take the lead Although because dominant woman are extremely uncommon I do not even have much of experience of dealing with such thing.
they all expect you as guy to be dominant.