I think my favorite has to be The good, the bad and the ugly, even if it is about 3 and a half hours long. Just love the scene where Blondie and Tuco re-unite on that trailer wagon, and Blondie offers Tuco a cigar as quits, "Well I find theres nothing better than a cigar after a nice bowl of soup". Then probably For a few dollars more, Fistull and once upon a time in America.
Love the final scene of Once upon a time in America where he's lying in the opium den and just let's off that crazy smile.
Are once upon a time in the west, and a Fistful of dynomite worth watching?