I enjoyed the exchange last year, thanks for stepping up to organize it again this year Sean!
I know there is a fine line between last year where it was difficult for you to pair up givers/receivers and getting too general in categories. Here is my 2 cents for your consideration and it follows along with what you proposed.
Everyone submits the following and places their specifics in order of desirability:
Preferred Set
Preferred Player
Preferred Team
Preferred Era/Category:
1900-1920
1921-1940
1941-1949
1950-1967
1968-1979
Modern
Memorabilia
So hopefully everyone can submit one specific for each of the 4 categories and rank those categories for desirability.