Weight or body shape can and do help ... but what I also find attractive about women is that they 'look after themselves' in the looks department. Even a fatter woman can be quite attractive just by making some effort.
So many women can be easily mistaken for butch lesbians now.
That said, a man should also make an effort even if just for his own health sake. My woman is a very attractive size 8, not tall, much like an Asian woman. She has long blonde hair and blue eyes, no tattoos thank god! She's an Aussie, her mother is German. She treats me with great appreciation and I appreciate her efforts. She is a wonderful compassionate woman as women should be.
