Almost everyone has a favorite muscle group they like to train and develop best. For most of the new or young builders this is the biceps/arms. Why is this, probably because strong arms and especially the flexed biceps is the summum of showing your strength. On the other hand, most people also have a muscle group they don’t like to train. And mostly that is legs.
Developing oak tree legs asks a lot of dedication and hard work. Training the legs wears you out and is often very painful, moreover most people don’t consider muscular legs as "sexy" as the biceps. They are often covered up and no eye catcher as fully pumped arms.