Earbuds hurt my ears :C I have my tragus pierced and it's hard to find a good earbud that the littel rubber/squishing stuff is open backed so my earring can fit it there. I only use earbuds over headphones because good headphones are more expensive than earbuds, and headphones are too big to put into my purse/pocket.
Headphones! preferably around-ear headphones at that. I like the portability or earbuds, but they always fall out of my ears and the ones with extra stuff built on them to wrap around the base of the ear either hurt me or just plain confuse me because I cant get them on/off easily >>;
Headphones. I can't use ear buds, or at least not good sound-canceling ear buds, because every pair I have ever tried, even with the smallest ear guard things (you know, the squishy part) are just too damn big for my ear holes. I can use the ones that sort of just sit over the ear hole, but those never sound even remotely good.
Headphones are much more comfortable to me and less people will talk to you if you're wearing a giant pair of DJ headphones in public.
I don't know what's wrong with my ears, but I just. cannot. Wear. Earbuds. At. All. I'm telling you, my ears must be deformed or something, because I've tried them many, many times, and they won't stay in! They won't stay in, damnit! D:< I mean- what the-?! UGGGH!
So yeah, no. i wear headphones. To hell with them being bulkier. I like them. I Love the kind that goes on your ears, with the band going around the back of the head. They're made by Phillips and they're pretty good.
I tend to use earphones more-- easier to carry around than headphones-- especially if you're running after the bus.
Though, I do prefer headphones in the sense of that they're not as bad for your ears. It sucks in the summer though since your neck gets sweaty and then is in contact with the headphones when you're not using them.