I don't even own a flash drive (my wife has few, but she needs them in school) I have a single 1TB drive attached to my network, there I store all my data (and rsync it to outside backup). This disk is almost full now and I'll look into buying something bigger.
Why would I need to carry GBs of music/tv shows in my pocket? Just in case I need to watch some episode or listen to that one song right away? :)