What headphones/earphones do you use?
These days I don’t walk around much listening to music, so headphones aren’t as important to me. But when I do need them on the go, I have a pair of Shure SE420s. They’re terrific in-ear phones—they sound great and they’re comfortable even for hours at a time. When I travel I always bring my Bose QuietComfort 15s. It’s amazing how great they are at killing noise around you. I can’t imagine flying without them now.