It’s true, for the longest time my left calf muscle has been bigger and more pronounced than my right. I think it’s a combination of a lot of things I’ve just gotten in the habit of doing over the years. Firstly when I’m standing idle it’s fully possible that I tend to lean on my left more. Also the aforementioned standing in the subway car since I tend to be standing on the right side since I know those doors in my train won’t open the entire ride until I get to my stop. Plus since I started taking martial arts my natural tendency is to kick more with my right leg since it’s my dominant one and that means that I’m balancing on my left more often which also contributes. I was told by a friend a while ago that since one of my legs is stronger than the other if I were roaming in the desert eventually I would be walking in circles.