Was it Sinclair who said "If you want to know someone, fight them. Then you see the real person" (or something like that. I think it was Sinclair.) Lando and G'kar fought each other so fiercely, with so much chutzpah, they were forced to each each other's true sides. And then, there's the whole "the enemy of my enemy is my friend" thing, since they both fought against the Shadows.

Another beloved story arch of mine was the one with Byron and the rogue telepaths. The love he had for his people, and for Leta was beautiful done.