These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Anti-Climax Boss: Instead of having an epic showdown with William Blake, Cole Wilson arrives in the last few minutes and dies rather quietly, while Blake just watches from afar. Most likely a deliberate use of the trope, given the film's love of playing with Western conventions.
One-Scene Wonder: Pretty much half the cast. Highlights include Crispin Glover as a creepy train fireman, Robert Mitchum in his last notable role as John Dickinson, John Hurt as his secretary, Gabriel Byrne as his son and Alfred Molina as a racist trading post missionary, as well as Billy Bob Thornton, Jared Harris and Iggy Pop(!) as a trio of deranged hicks.