I was a big reader of Zane Grey as a young boy, and so horses and the West figured large in my imagination.
If you write a book set in the past about something that happened east of the Mississippi, it's a 'historical novel.' If you write about something that took place west of the Mississippi, it's a 'Western'- and somehow regarded as a lesser work. I write historical novels about the frontier.
I'm an enormous fan of American literature, and especially the great novels of Larry McMurtry, 'Lonesome Dove,' Cormac McCarthy, Elmore Leonard.
I have always loved westerns... supernatural westerns in particular. One of my first professional short story sales was a horror/western story. It wasn't so great, though, so I'm glad the magazine folded before it saw print.
Preacher is a book that somehow allows me time by its settling on it's characters, that sort of modern gothic western feel. You're not likely to see the boat veering too far from that.
I read a lot of Louis L'amour Western books.
Ever hear the expression "write what you know?" My version says "write what you want to know." If you want to know about the history of Spain, write about the history of Spain - fiction or nonfiction. If your fascinated by the old west, maybe your character lives there.
I had a blast writing the Ranger in 'The Great Dinosaur Rush' for the Moonstone collection. The story turned out to be twice as long as it was supposed to be, but I was having fun. I even showed the Ranger in his 'old prospector' disguise, and I had some nice exchanges between the Ranger and Tonto.
In 1935, Faber & Faber published an anthology entitled 'My Best Western Story' in which the genre's leading practitioners contributed what they considered their finest. Alas, literature the stories ain't; they appear more like fossils from a spent mine.