The kind of person he is; all that integrity, his values, his perspectives, his approach to things/life, what he stands for, strives for, and where he stands within himself as a person and determined to be true to that and work hard to be the best he can be... Just something so admirable in that. And often relatable.
When the others in the last film would be saying
"Lets all be human!" he's the one essentially saying, "
Hell no. These are the cards I was dealt in life, and I'm going to play them the best I can; no cheating." He won't take the easy rout if it doesn't feel right to him, instead he'd carry the burden and climb the mountain to gain from it later. Admire the heck out of that.