I think that partly depends on whether one wants to work for a large or small salon. In larger salons, it's more common to specialize -- sometimes clients may get color processing from one stylist, a cut from another, and a style from even another! Even if a cosmetologist want to work in a smaller salon, it's a good idea to choose a specialty early, because they get established in what you do. It's hard to go from hair to nails to waxing, for example, and to be considered an expert in all of those.