I really don't think it matters that much, as long as you have the required muscle mass and physical shape for your weight. Your body is built the way it is, and as long as you keep it in athletic shape it will do whatever you want.
If you relatively are overweight,(out of shape, excess fat) that will effect your riding because your body is lugging around a bunch more weight then your muscles are used to hucking. I used to be chubby and lost 40lbs years ago, and it made huge improvements for my riding. I had more stamina, landings and bumps were much softer on my knees, I had more agility, and just overall I was able to huck my body faster and more accurately.
So if you are in shape and within a healthy weight range, don't worry about it, it's just the way you are.
PowderHound and TreeNinja