As far as your favourite being the one you were introduced to, that's typically not been a thing for me. Like Lorne Michaels saying the SNL you loved the most was probably the cast during your high school years; but mine was when I was in Middle School. As far as Clint, even though I was introduced to him via Rawhide and the Dollars trilogy; High Plains Drifter immediately became my all time favourite when I saw that at around 15. It was an "experience", like watching A Clockwork Orange for the first time. At that point, never have I seen a Western (with supernatural elements) that was that unique.