You point out that Darcy is a "man of action." I remember reading a comment from a rather cynical critic to the effect that of course women adore Mister Darcy, because he's a man who, when a woman told him what was wrong with him, actually listened and changed.

Of course, this overlooks the fact that Elizabeth had her own self-revelatory struggle to go through after reading Darcy's letter and realizing she'd been wrong about Wickham: " . . . until this moment I never knew myself." In Darcy's successful proposal and Elizabeth's acceptance of it, we see that both parties have taken some very important "action" with regard to their own characters. It's common to warn young people that you can't expect to marry someone in the expectation of "Oh, well, I'll change him (or her)." How fortunate that both Darcy and Elizabeth take charge of their own changes! ;-)