I believe if you take any group of 100 no matter what it is you will find that 70% will fall into the plain - average category, 10% will be good looking/above average, 10% will be "drop dead gorgeous", and the other 10% would be considered unattractive or down right ugly.
Having said that men have also been known to give "points" based upon (body assets) they admire. Some guys love "thick women", some like long hair, tall women, short women, big breast, big behinds, and for some it comes down to having a beautiful face/smile/skin.
Beauty really is in the eye of the beholder! We see proof of that everyday. Go to any department store, movie theatre, restaurant, church, amusement park, beach or wherever and you will see people (you find unattractive) who have spouses and significant others. People who blame their looks for not having someone are lying to themselves. It's usually their attitude or their unrealistic desire to pursue those who are "out of their league".
What are the odds of someone who looks like actress Gabourey Sidibe from the movie "Precious" attracting a guy that looks like Brad Pitt or Shemar Moore for her husband? Slim and none; and slim has left the building! Having said that if you take a guy who looks like rapper Notorious B.I.G and give him fame/wealth he'll attract women who look like Victoria Secret runway models!
Unfortunately for women most men place a higher value on their looks then then their status in life.