Closed or open back: I don't understand about the difference. I just want the one that has good isolation.
Portable or non portable: Both, I don't want them to be heavy. Will be using it at my house most of the time though.
Sound preference: Bass that shakes my head but good crisp sound, also if a song has bass, I don't want it to flush out the vocals.
Isolation: Yes, I like hearing what I'm focusing on only.
Size: Not big, stylish, and not heavy.
Ear preference: Over ear, hate on ear. What will you be using as the source? (Iphone, computer, etc): Gaming, Dubstep, Movies and Music. Mostly on computer and phone.
Do you have an amplifier for the headphones?No.
Any other requests? I need them to be very comfortable because I will wear them for probably 10-12 hours a day.
If you need anymore information tell me! (: