Anyone who has multiple headphones (I.E. me) is exempt, since we have different headphones for different situations.
EDIT: Also, I think the concept of introducing ownership into the equation differentiates the two -- there's no ownership in Bonds or Doctors, other than by the actual show makers. So we are free to pick favorites in things we own, or things we feel the need to pare down, either financially, or just because.
I mean, I have the same problem picking favorite movies from 2013 (I have four [Gravity, Stoker, Upstream Color, and The World's End], favourite albums (if you just listened to what you consider your favourite album for the umpteenth time and felt like something different, is it really -- right at that very second -- still your favourite album?), favourite movies of all time [blade Runner, but if there are so many different versions of it, and I wouldn't change a thing about Pulp Fiction or From Dusk Til Dawn -- neither of which I consider even remotely my favourite movie -- then...what? Am I just indecisive?).
EDIT #2: By the way, this is my ranked headphone list:
Leatherheads
everything else
...you have to start stating criteria to get any more detailed than that (portable -- the Leatherheads just aren't -- etc.).