While humans are a visual species, and looks are important for a first impression ... An emotionally mature person will be attracted to somebody based on intelligence, attitude, and emotional maturity.
Unfortunately, most men think so. I think that all women, no matter what shape or size, are beautiful, and the men who think that we have to be slim to be beautiful can go **** themselves with a cactus.
I don't think it should, most of us guys aren't such hunks ourselves. A mature person looks for important traits such as sincerity, intelligence and compassion. Be yourself and the right guy will come along.