Miyavi is the only one I listen to now. I used to listen the Dir En Grey, The Gazette, and Alice Nine like they were my lifeline or something. The only fan fiction I had with j-rockers in it never made it to the site, it did make it to my trashcan though, it wasn't very good.
Love it I know ashuri-chan loves it too and I don't usually write j-rock fan fics but I see myself getting around to it eventually. It would be good to start the ball rolling.