It would be nice if instead of just Acquisition Place as a field, we could have a way to break it down further. For example, I like to keep track of where I bought an item from (eBay, local LCS, expo, flea market, etc.), which is what I put in the Acquisition Place field. But I also like to keep track of who I bought it from (seller's full name AND user name if known) or who gave it to me if it was a gift. Additionally, I like to know what location the item came from (Country, City, State, etc.) if I bought it online or while traveling. I currently cram most of the above mentioned information (name, username, location data) into the Private Comment Field and it looks a mess, especially in a smaller window.
I know several new fields were already added this year, and I know adding custom fields for users to do as we want have been mentioned before.