In the custom fields for items we use a classification value which is usually out of 4 or 5 choices. it would be great to create a list of values for the custom field like the data validation feature in excel where you can have a drop down list under the cell and just pick a value from there.

For example, When creating a new item I like to classify them as 'Spare Parts', 'Electric tools', 'Pneumatic tools', 'Consumables' etc. Its usually something out of those values so rather than having to type it in everytime I create a new item if I could just pick it from a drop down list it would make my life a lot easier.