Whilst Salo is a little uncomfortable to watch at times, I personally regard it as a masterful piece of film-making in many respects... however, understandably due to its subject matter and overall tone it won't be to everyone's tastes.
To be honest, of those I've seen from your list I can see how they could all grate on someone's nerves (NBK, Fight Club etc.) or not be held in high regard, despite liking a few of them myself.
