Clearly the Doctor had lots of learning potential, since he exercised it regularly. But was the learning capacity in the EMH intended for the program to develop an interest in opera or starship command? I don't think so. At first the Voyager
EMH had little interest in anything outside of medicine and preferred to be shut down when idle rather than indulge in recreational activities. Was the change in his attitude a side effect of running longer than intended? Or was Zimmerman working on a long-term hologram and included the capabilities in the EMH for later use? I wonder.