Asset Bank allows you to create additional attribute fields over and above the default set provided (Title, Description, Keywords, etc.). This gives you the flexibility to best describe your data, e.g. adding a 'country' drop down, or 'product ID' field.
Other options include model release forms, star ratings, reviews and collapsible headings that allow you to group data together. All fields can be re-ordered by admin users and some can be highlighted to help draw attention to important information such as image credit.