Almost from the first week I touched a weight, I've had proportionately large deltoids. But big isn't better, especially if the anterior (front) delts are huge, the medial (side) head smaller, and the posterior (rear) head flat and unimpressive. This unbalanced development is the problem I've had to overcome in the past few years.
The higher you go up the ladder of development, the more perfectly balanced your physique has to be in order to create the desired appearance. Each individual muscle group must be fully developed from origin point to insertion point.