Go girl. :) There is nothing wrong, and a lot right, about a big and beautiful woman. My longest relationship, other than my wife, was with a big and beautiful woman. I call my wife my "pillow woman" and like lounging against her. Sure, a skinny girl can be cute, but who want's to cuddle with one?
Here are two women who I find very sexy and, if I was single and had a snowball's chance in Hell, would go after:
Dawn French (God how I love her, especially as the Vicar.)
Kathy Bates (She turned me on in Misery, with is... disturbing.)
Nikki Blonsky (She is so perky and her voice is like an angel who just drank a six pack of Coke.)