Skullcandy, when I can get them cheap since I go through headphones like crazy, they're really comfortable. Otherwise, I use a pair of sony around-the-ears at home and some iphone headphones I grabbed from our strangely growing pile of ipod headphones at home. I don't like paying more than fifteen dollars for headphones, probably because even the really expensive ones wear out on me really quickly (I get about two months before having to replace them)

skullcandy innear headphones if people are around.
earbuds if there is pure silence and it's just me.

no point listening to crap if it's damaging your hearing anyway. ie. people who listen to earbuds whhile running outside with cars passing by. tlak about hearing damage.