I own a gym and have worked as a trainer for quite a few years and have well over 10 years of experience in training of all different forms.
In my experience it really doesn't matter what women are attracted to. Different ones like different things, so you just have to go for what you like and what makes you happy. Like with most things game matters the most, so if you can create attraction for a women you can get her anyway. Being fit and having a good body (whatever that is to YOU) is icing on the cake and just makes it a easier. But a girl isn't going to turn you down because you don't have her ideal body type if you do everything else correct.