Loved The Downward Spiral. Also The Fragile and all the remix stuff that was released. Think I own almost all of the special releases, except for a few weird japanese versions.
However I could never really get warm with The Fragile cd2.
Nowadays... feels like NIN sounds too much the same. I mean, the new releases sound different, but I could swear there's always the same elements and that makes it so used up to me.
The soundtracks are all good, but also always the same style... that doesn't help it much either. Generally I haven't been excited for a new release in years.