I don't mind if a headphone is a bit bright, actually I want to a headphones to be more neutral or slightly bright. I just don't want headphones to have piercing sibilance, I can handle some sibilance, but when it's overdone I can't. I found the Sennheisers I've listened to to be too tame for my tastes, they sound fine but they are not my cup of tea, I've been told the HD 800 is different but that is way out of my price range. I guess I want a more analytical sound that isn't too rough on the ears. I tend to game, watch movies and tv shows, and listen to all sorts of music. I'm not too picky about bass as long as it's good quality.
dt880 fits the bill almost perfectly.