Chuck Bartowski is one of those people.
Not a "those people" that people find annoying, or hate, or want to kill—not one of the usual kinds of "those people." No, Chuck Bartowski is that kind of rare individual, that perfect blend of all the good humanity has to offer—cute, funny, unfailingly polite, honest, humble—that people can't help but fall in love with.
It's why everyone at the Buy More listens to him. It's why Morgan has stuck by him his entire life. It's why Ellie is so determined to find him that perfect someone. It's why Devon works so hard to be Chuck's brother while making miniscule efforts to keep up with his actual brothers.
It's also why Sarah has been so thoroughly compromised, almost since the she met him, that she has become one of the three absolute best people in the world to protect him, because you can't do much better than someone who's willing to put their life of the line for you not matter what, and who has the training to pull it off.
It's why Bryce Larkin has been watching out for Chuck since their first bumbling meeting at Stanford (It's also why he learned to speak Klingon fluently instead of just memorizing a few phrases for Comic Con.).
It's why John Casey missed, and would always miss.