I'd like to have different types of custom fields in addition to text, numeric and date. I'd like to see radio buttons and drop-down menus added to custom field types.
Dropdown menus are currently possible through the "Multiple Options" field type, and while technically not a radio button, "Single Option" provides multiple possibilities but only allows the user to select one. Although, I'd like to see radio buttons as a style choice!
I would love to have the ability to have conditional logic in custom fields as well. In our example, I would like to choose a product, and then ad what kind of service level agreement that product has.