If You Can Only Have One Headphone...
...what would you choose and why?
Obviously, I'm speaking to those who have multiple headphones. The main rule of this post is that it must be a headphone that you own (bonus points for picture!). Also, in the context of this post, this would be the only headphone you would ever have!
The headphone in question can be of any type: over-ear, on-ear, or IEM.
For me personally, if I was being more rational about it I would pick the Sennheiser HD 6XX for its scalability, versatility (actually makes surprisingly good out-and-about headphones provided you don't mind the open-back), and ability to make everything sound good. However, I just don't love the HD 6XX like I love my LCD-3; its sound just hits all the right buttons for me.