The take away from this thread is there isn't a top 10 Westerns list, more like top 100. 

I'm glad to see one mention of McCabe and Mrs. Miller. The soundtrack is so dated, it almost kills the movie, but it is still one of the unknown classics.
My favorite is The Wild Bunch. I think it could have been cut down a little, but I think that of most movies. I think the TV series Deadwood was the pinnacle of TV westerns, although each season had its flaws.
I do love the Duke,
Going with Yellow Ribbon, The Searchers, True Grit, Liberty Valance.
Like Josey Wales, Butch and Das Kid, Lonesome Dove,
And Unforgiven.
Sort of a Yellow Ribbon trivia question-
What was a Reb (like me ) who agreed to join the Union Army and go out West and fight Indians called?
the man with the black hat, black clothes, black horse, black whip....and his side kick.....
The Quick and the Dead. Just watched it again the other night.
For me, the only flaw with the Deadwood Series, was that they shut it down about 3 seasons too early!
I was hoping nobody would list Blazing Saddles as a favorite western. Anyone who thinks Blazing Saddles is a western probably thinks Young Frankenstein is a horror movie.
Strother Martin was an interesting guy. To me, at any rate. He'd been around in bit parts in films and on TV since the fifties. And he always seemed like an older guy to me, perhaps because his hair was prematurely grey.
I think he could've gone on to bigger and better things as a character actor...his abilities were really beginning to be noticed during the last ten years of his career.
Sadly, he died a fairly young man...he was only 61 when he passed away.
No movie ever made has more great quotes than Josie Wales.