Narrowing my list down to 20 has been hard enough. Putting in order of favourites is proving nigh on impossible.
Had the same problem. Still it was a useful exercise. I have no special favorite among the American westerns, that one movie that rises above the rest, in fact there's not too much light between the first seven or eight movies on my list, they're all particularly fine. In the end it was a bit of a surprise to discover that High Noon is my favorite. Of this group of very fine movies, High Noon's the one I like best and return to most often.
My list would've looked differently if I had entered more titles of directors like Hawks, Walsh, Boetticher or Peckinpah, but i decided to limit myself to one title. Therefore there's no Wild Bunch, Red River or El Dorado. Only Ford and Mann have two because I like their work best.