Some of the most fun was watching the credits and Googling the people in them. The incredibly familiar-looking Robyn Lively (who I must know from SOMETHING, though nothing immediately jumped out on IMDb) is indeed Blake Lively's half-sister. Russ Tamblyn? Amber's dad. Mary Jo and Caleb Deschanel are Zooey and Emily's parents. The Diane Keaton who directed an episode is THE Diane Keaton. Craig MacLachlan is Kyle's brother.
Piper Laurie will always freak me out and be Carrie's mom. David Lynch plays Gordon Cole, in case you weren't sure what he looks like. Peggy Lipton will always be striking.
The guest stars were also fun -- from an incredibly young Alicia Witt to five seconds of Molly Shannon. Lots of Heather Graham, Billy Zane with hair, and transvestite David Duchovny.
Parts of the final episode made me laugh out loud. I suspect they were not supposed to be funny. None of this spoils anything -- at least, I don't think it does.
Oh, also there are a LOT of characters.