I played hockey growing from the age of 4 to 20. I played goalie and i have think that some of my better/worse body parts may be explained/caused by hockey.
Biceps - I have trouble getting a pump in my right bicep and it is smaller and weaker than my left. This might be because my left arm moved(glove hand - vertical movement) where as my right arm there was little movement(held stick no vertical movement).
Quadss - Same as the biceps. Left leg is a lot stronger than my right. I favored my left leg to get up on the ice.
Calves - My inner calves are drastically more developed than my outer calves. In hockey you are always on your inner edge.
Shoulders - are a good body part for me. As a goalie I had to keep my arms up and out any time the puck was in the zone.
I look at Phil Heath and all those years of basketball may explain why his arms are one one of his better body parts.
Just curious if anyone else has found earlier activites/sports influencing their better/worse bodyparts.