I love all the ones you've mentioned, and still others. Hell, it's *all* good.
But the one I anticipate the most of all every time, even more than the reunion, is the dozy embrace. I love the way the camera scans up those long legs, then Ennis appears from behind, his humming and soft-talking, the way he caresses the lambswool collar of Jack's coat as if it were him he was caressing, the way the camera pulls back and takes in the two horses grazing peacefully behind them, that last little squeeze Ennis gives Jack before he says, "I got to go. See ya in the mornin." The way Jack turns and watches him ride away, with the soul just oozing out of his eyes and mouth. Makes it hurt all the more when that look is contrasted with his look 20 years later, with all the soul gone from his eyes and his face as cold and hard as stone. But it's so worth it. And in an instant, one understands exactly why Jack held out all those years.