I have to add this for sure:
'Tell you what...Truth is, sometimes I miss you so much, I can hardly stand it.' I thought he just did it so perfectly...the right pauses, the right breath.
The entire lake scene starting from 'Never enough time, never enough' Sometimes when I'm sitting around at work or at home or some place I can suddenly hear the lines they way they both say them...They leave such an imprint on the mind. So distinctive and so deeply heartfelt...
Some of the other line deliveries I like:
'One curve in the road in 43 miles and they miss it'
'Never taught me a thing. Never once come to see me ride.'
'She got lucky.'
They way Jack says 'Alright' in a soft voice, after Ennis snaps 'I don't need your money, I ain't in the poorhouse.' There was just something very vulnerable about it.
Jack to Aguirre 'Nothin' up on Brokeback?' Jake's face in this scene.....
'I got a boy. Eight months old. Smiles a lot.'
'Red-lined it all the way, couldn't get here fast enough.'
'Old Brokeback got us good, don't it.'
'Long as we can ride it. Ain't no reins on this one.'
I'll stop here before I go through the whole film