My collecting interests are legion and mostly ephemera-related. Besides comics I collect:
Bookmarks - c. 17,000 total of all types. Of interest here may be a set of Doctor Who bookmarks originally owned by the show's producer. Also a number of comic/superhero related bookmarks.
Vintage Postcards - c. 3,500 of different types. Particularly look out for hand-drawn or hand-painted cards; applique cards; signed cards; volcano-themed cards; cards posted before 1900. Outside the day job I deal in vintage postcards.
Matchbox Labels - c. 3,000 of different types. Particularly look out for labels from the manufacturer Octavius Hunt of Bristol, UK.
John Peel Radio Shows recorded off the radio and on tape - c. 750.
Freebie dot.com internet hosting company CD-ROMs given away with British newspapers c. 1998-2002 - c. 75 total (I know, weird, right?)
American Football - or as most here would call it - 'football' ephemera related to the game as played and publicised in the UK before 1980. c. 100 items - mostly programs, tickets, press photographs, random stuff.
Here are a few items from the final category. The second of three is a report from the first game played on British soil - an exhibition match between the crew of two American battleships.