Name a CD you own that no-one else on your friends list does.
Let The Dog Out, by Gondwanaland.
Name a book you own that no-one else on your friends list does.
The Evolution Man by Roy Lewis
Name a movie you own on DVD/VHS/whatever that no-one else on your friends list does.
The Way Things Go (inspired the Toyota Cog ad.) or Enigma, or Das Boot
Name a place that you have visited that no-one else on your friends list has.
ooh... um. Camooweal? Longreach? Mt Isa? Chipping Ongar UK?
Name a piece of clothing that no-one else on your friends list has.
a white t-shirt with a sniggering Muttley on the front.
Name an occupation that you've had that no-one else on your friends list has had.
Mainframe Tape Librarian is a fair bet.