Most say that hands are the hardest to draw. I have always found that legs were harder for me. Interestingly I think it is due to the fact that much less drama/emotion is communicated through them as opposed to the upper body and face. Legs are more utilitarian as opposed to a driver of character, but know that a power lifter's legs are different than those of a long distance runner, or a man who spends most of the day sitting. One should play with details like veins, hair, girth, length and emaciation
here I tried to cover the most common angles and focused primarily on legs with skin. Not all muscles protrude equally.
Hopefully this reference page finds you well,