My favourite bands are Iron Maiden, The Prodigy, Infected Mushroom and Nine Inch Nails. The thing they all have in common is huge depth of sound frequency and intricacy. A good producer will make every sound distinct, and as Maiden are the only one without a producer as a key band member, they've probably made the highest proportion of dodgy nonsense.
The other important aspect with NIN is the connection with negative emotions. I first heard NIN aged 13 (Fixed, no less), and was completely sucked in. The Downward Spiral came out within six months of me first hearing NIN, and I listened to it probably at least once a week, in full, for nine or ten years.
At the time I thought that what I liked was that it expressed my teenage angst and made me happy that somebody else crystallised my feelings in such a way that I knew I wasn't alone. While that is definitely true, the thing that keeps me listening as a thirty year old with far more confidence than anyone has a right to have is the detail, the soundscapes, the sheer fucking beauty of so much of NIN's work.
The modern teenage angst equivalent might be Korn, or My Chemical Romance, or any number of other bands depending on when you consider "modern" to be, but neither Korn nor MCR* have much real depth to the musical composition, and once their audience moves on from navel-gazing, what is there in the music?
*
Welcome To The Black Parade is tremendous though