I'd watch
Little House on the Prairie for few days. I'm on season two now. Some episodes run 1 hr and some run less 50 minutes. That's pretty long. Longer than any tv shows I have watched.

Laura Ingalls - not smart but very tomboyish, friendly, extroverted
Mary Ingalls - smart, but insensitive to everything, introverted
Nellie Olsen - smart, bratty, showoff, tattle teller
Willie Olsen - bratty, braggart, gossipy, bully
Olga (Kim Richards) - somewhat resemble Laura and Mary.