Headphones at home and earbuds out-and-about. If you wear full circumaural headphones in public you're a complete tosser because:
A) they look ridiculous on you, you stupid hipster, and
B) I know for a fact that either your headphones are shit and the sound quality isn't worth their size, or they're plugged into an iPod filled with horrible DRM'd 128kbps iTunes files, in which case the files sound like garbage and the device can't drive the headphones properly anyway.
The stupid "headphones in public" trend isn't as bad as wearing "packaged with the device" earbuds though. I will punch you in the face if I see you walking around with those in your ears. Spend $10 for a less-than-abysmal pair of buds, plz.