When creating a formula with the formula tool, it would be useful to be able to quickly tab into the data type column, then press D for Double and select this quickly.
Right now, you cannot use the keyboard to quickly type-ahead in this field, so every double field requires you to select, drop down, move the mouse to the bottom of the scroll window, click scroll down, then mouse back up to D for double.
(or "S" for Spatial etc - this is standard for most drop-down boxes)