"I knew a girl, once, who had a really remarkable talent for music, and she didn't know it; never guessed what sweet little things she composed when she was alone, and wouldn't have believed it if anyone had told her."
Fritz Bhaer, period. Say what you want about Jo/Laurie or the lack of it — that man earns his happy ending in magnificent fashion. After all the waiting, all the hoping — he's been a bachelor for years, after all — he finally finds love and finally gets his girl. And it is beautiful.
In Little Men, Jo is trying to teach Daisy how to cook and hang curtains at the same time, while Fritz keeps coming in to make interjections. She finally drops the curtain on his head and tells him to stop, or else she'll "come in and moralize while you are teaching Latin, and how would you like that?"
Fritz: "Very much, try it and see."
The fact that in Little Men and Jo's Boys, the principal characters are one big happy family - Mr and Mrs March, the March sisters, their husbands, children, and the Plumfield students. Franz and Emil are actually cousins of only Rob and Teddy (through Fritz), but they also regard Rob and Teddy's other cousins, aunts, uncles, and grandparents (through Jo) as their own kin. They call Jo's father "Grandpa," and her sisters and brothers-in-law "Aunt" and "Uncle." Likewise, Emil is the favourite cousin of Josie, Meg's second daughter, though they are not actually relatives to each other.