I think there are many advantages and disadvantages to both. Never done the mooring thing for an extended time but would consider it soon as our boat is about finished with major projects, one of the primary reasons for taking a slip vs mooring in our situation. In addition, its much more common to seeing boats in slips vs moorings on the Chesapeake.
Once our boats has solar and/or wind power I will probably move to a mooring. In a storm, I would think a boat would do better then in a slip? (assuming both were relatively protected from fetch).