Being serious though, at the end of the day, there is not really that many genuinely bad bits of hifi. You have to account for taste.
Did the review say what kit they listened to the 531 on? No. Did it say what persons tastes were? No.
I've heard the DT531 sound pretty bad out of one or two amps. The bad reviews may be justified if they used the same amp.
The amp I use for the DT531 makes it sound really, really good for the money (IMO). It does all of the things right in the areas that matter to me, and the things it doesnt do right are not that important to me.
For what its worth, I feel like I am mostly responsible for the hype (by replacing them with the CD3K and HD650 and then going back), but please remember, I have NEVER said that they were on a technical equal to the others. Just that for my tastes, on my system, and for my circumstances, its proved to be the only choice for me.
Its comfortable, sounds lively, is forgiving, and always makes me smile. Aint that what matters?
But no, its not as realistic, smooth, refined or natural as a lot of better cans, but then I never claimed it was
It may be a fad, but I'd like to think that they'll still be with me. They give me what it is I was looking for, and to me, it matters not if they fall out of favour now. They do it for me, and thats what counts.