I would love to have the ability to save a drop down field for use in other forms. We have two very long drop down fields that we use over and over again.
One of them is for STATE because our CRM lists by abbreviation and not the full name of the state. (This might actually be a great idea to add to your standard drop down choices.)
The other one is over 70 choices long and not only does it take awhile to make, but I am always worried I will make a mistake in the spelling or format which will result in an inaccurate entry.