It can be argued that Ennis is the more reticent of the lovers, whereas Jack is the more emotive. Nonetheless, one can say that Ennis's love is deeper, more enduring, and ever faithful.
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Which of the two is closer to your idealization of love? Which of the two captures your heart?
Now Thomas, you know I have to step in here and gently disagree with you.

No way is Ennis' love deeper than Jack's. As you pointed out, we saw different examples of the way that they loved one another, but neither could be said to be any deeper than the other's. They simply felt and expressed their love differently.
Having cleared that up

I will go on to say that for me, Jack's love is closer to my idealization of love. He gave with his whole heart, bent with the wind to accomodate the relationship, and accepted Ennis exactly as he was with whatever Ennis could give, despite the frustrations and disappointments of being denied that sweet life he craved so much. The fact that he was willing to put himself on the line - trying to reach for that life for both of them, knowing he could get shot down - was, to me, quietly heroic. Like you, I am drawn to 'Jack's vulnerable openness and acceptance.'

I
love Ennis (how could you not?) and feel a fierce protectiveness toward him, as well as a deep appreciation for what he gave when everything he'd been taught told him not to, but I'm
in love with Jack because he was a beautiful dreamer.