I suppose there is; people tend to be attracted to something that's familiar to them. Hence, the reason why we still have people that are pure bloods. There can also be physical traits that you simply like for whatever reason, just like you said about yourself.
It is commonly said that beauty is in the eye of the beholder; I am fully convinced that this is true, after comparing what a foreign friend of mine found attractive to what I found attractive.
There is also the fact that a person would be most attracted to the person with the most contrasting genes to produce stronger offspring which is the reason there are mutts in the world.
And yes, there is an optimal body shape for humans. For example, males are most typically attracted to women with wide hips becuase they are good for childbirth, even though that is not what they are thinking when they are attracted to this feature. However, obviously not all people are attracted to the "optimal body shape". Like I said before, beauty is in the eye of the beholder.