Near Union Station in DC...including the Metro's Red Line...
90% of the people using on-ear or over-ear phones are Sony. 8% are Bose, 1% iGrados and 1% are Denon. Oh wait...that's me. lol
Of course, then there's the old guys wearing RadioShack FM Radio Headsets...
As far as ear buds, almost all of them appear to be the stock iPod buds. Every now and then you'll see someone with some crazy buds with big ear hooks on them. Then a week ago I saw someone with the Shure IEM's...recognized them instantly. I was envious.
Flying, though, I've seen all Bose. Never seen a Senn, or Denon. As I said, I use the Denon N/C HP's, and love 'em.
I wonder if someone has seen me and written it up here?