The AKG Y50's. A bit of an odd pick, sure, but for everyday use, I absolutely love them. I love the sound, I love the noise isolation, I love the look and I love the fit. If I could only have on set of headphones, that's my pick.

Don't get me wrong, they're certainly not the best sounding headphones I've heard or even own. If I want great sound, I'll be sitting on my couch listening through my X2HR's or HD58x'd. But because they've open backs, you can't really bring those on a bus, or even take a walk with them on a windy day. The best closed backs I've got are the DT770 Pro's (80 ohm), but the sound isolation just doesn't cut it. Same story for all of my other closed back, actually.

Really, my headphone journey started with me trying to find a suitable upgrade for my Y50's, but so far I've been unsuccessful. I'm starting to think the Y50's really are my perfect convenience set of headphones. It's a shame that they've been discontinued.