A C cup should be fine. D cups would make them look fake and you WOULD look top heavy. It would make your legs look really skinny, but it makes you look broad on top. It also could make it hard for you to shop for clothes as well. CCs will vary from person to person. Everyone has one breast that is smaller than the other, and in order to make them even, the surgeon has to compensate for this factor first. Also, guys are different and some DO like really large implants. You should be more concerned with what YOU want, as it is your body. Guys may come and go, but you have to live with the results. Good luck!!!