To be honest, I much prefer Spaghetti westerns over the American ones. They are somehow much more epic - they are also grittier, dirtier, nihilistic; feels more realistic in their appearance; they feature antiheroes as protagonists, and the representation of the villain is also much more complex than simply "this is a bad guy".
I would watch anything with Clint Eastwood though, haha.
I watched Death Rides a Horse (1967) a few days ago, a revenge story with a twist starring Lee van Cleef who's amazing again, and John Phillip Law who didn't impress me much, his character and acting just feels "wooden", and his monotone John Wayne impression doesn't help either, but it was interesting to see the chemistry between the two. 7/10
Next up is Once upon a Time in the West, Mercenary (set to be released on BluRay this year!), The Great Silence, and Duck, you Sucker! After that I will lighten up the mood and turn to some Bud Spencer and Terence Hill, namely their Trinity movies hehe.