Really loud according to other people but I am used to it and don't think it's that loud, my dad said he almost went deaf when he listened to the music on my ipod nano I had it up so loud.
I'm pretty cautious about volume these days as I've lost some of my hearing to listening to loud music for years. I have a studio headphone/tube amplifier setup so it can get quite loud but I'll only rarely crank it all the way up. No regrets!
Depends what song I'm listening to. If I was listening to something soft, I wouldn't exactly blast it. If I was listening to something a little heavier, or maybe something I wanna dance to, I'll play it so loud the neighbors will go deaf before me.
I'm HoH so I need my audio to be loud to understand it. However, if I'm listening with earphones, my phone has a neat little warning that says "this is too loud are you sure you want to listen at this volume" and I have no idea why but that makes me feel a bit sad and convinces me to listen to it softer. I guess it's because I have a tendancy to draw out emotions from the weirdest of things.
It honestly depends on how I'm feeling, if I want to relax then I will obviously have it on a low volume but if I'm travelling somewhere, which I frequently do, I have it quite loud as I mainly get the train to college and trains can be a bit loud, but if I'm travelling by car, I'll still have it on (almost) full volume. :')
Around 12% on cowon and computer.
I've invested in mid-range earphones so rather than wanting sound thrown in my ears, I enjoy noticing every intricate detail of music and it's arrangement. Aaaand groove~
I used to play music loud... but I guess that's because the sound was muddy due to the compression.