Willow vs. Winnifred - Who was the better geeky genius girl best friend/sidekick (Willow for Buffy/Fred for Angel) What was their interaction all about in 'Orpheus'; could they have become a power "couple"? Why did they both turn/give into evil?
Buffy the Vampire Slayer excelled in academic hours (Prophecy Girl, Helpless, Chosen, Innocence, Once More with Feeling, The Body, Hush, Restless, Earshot, Doppelgangland, Who Are You?); which are the richest and most successful at what they aim to do? OMWF as a musical. The Body with no music. Hush with no speaking, Restless with dreams or Earshot with Buffy being telepathic. Innocence with the lost virginity/lost love metaphor with Angel losing his soul. Prophecy Girl, Helpless or Chosen with Buffy changing the slayer mythology. Doppelgangland or Who Are You? for character studies on Willow and Faith (for that matter The Zeppo, Fool for Love, Darla, Harm's War and Selfless for their respective one episode character studies on Xander, Spike, Darla, Harmony and Anya to name a few I can think of).
What are your favorite metaphors used in the Buffyverse? High School is Hell (Ignored Girl Turns Invisible, Psycho Cheer/Stage Mom is a Witch, Pack of Bullies= Hyena Possessed), Sex Metaphors (Turning into a Werewolf=Puberty, Having Sex = the guy loses his soul, Lesbianism is like Magic), Magic Addiction = Drug Addiction, Bigotry against demons= bigotry in real life against other people.
Best Villains of the Buffyverse.
Why Dark Willow was such a big disappointment; how scary and effective she could have been if it was executed better, starting with the horrible veiny makeup. And why she should have clashed with Amy Madison before Buffy in the last arc of S6. I like that Xander saved the day with his love for Willow though.
Buffyverse Best Big Bads and Best Monsters of the Week.
In my opinion...
Best Big Bads: Angelus, Spike & Dru, Glory, Faith, The Mayor, The Beast, Jasmine, Illyria, Wolfram & Hart/Circle of the Black Thorn, Caleb, Lilah & Darla (could both be considered big bads)
Worst Big Bads: Maggie Walsh, Adam, The Trio, Dark Willow, The Master, The First, Ubervamps, Holtz, Sahjhan, Skip, Eve, The Anointed One
Best Monsters of the Week: Vamp Willow, Sunday, Veruca, Dracula, The Gentlemen, Ted, Catherine Madison, Holden Webster, The Pack, Balthazar, Gnarl, Queller Demon, Glow in the Dark Slug Demons (The Price), Telepath Demons (Earshot), Toth, Kakistos, Pavayne (HellBound), Marcus (Carpe Noctem), James (Heartthrob), Penn (Somnambulist), Wesley's Father (Lineage), Smile Time Puppets, The Judge, Poltergeist (I Only Have Eyes for You), Fear Demon (Are you Now or Have you Ever Been?), Zombie Police Officers (Thin Dead Line)
Worst Monsters of the Week: Daryl Epps, Lyle & Tector Gorch, Inca Mummy Girl, Doublemeat Palace Demon Lady, Gwendolyn Post(should've been more than a monster of the week villain), Lissa Xanders Demon Date, Moloch, Natalie French, Lawson (Why We Fight), The Nahdrahs (Provider), Loan Shark (Tabula Rasa)