In workflow Constants, it would be really useful to be able to populate a new field associated with each user created constant.
E.g. Type, Name, Value, "Description"
The description could be left blank but also populated by workflow designers to attach commentary / business logic to the constant.
E.g. Type = User, Name = MyUserConstant, Value = 0.25, Description = "This describes the weighting factor used in Product Calculations"