BTVS was never subtle about the message it wanted to get across: women are strong, multifaceted badasses.
Buffy has sex. In high school, with a vampire. She has a one-night stand soon after starting college. She saves all of humanity, then brushes the dust off her stylish-yet-affordable boots and does the damn thing in the dating world. Her proclivity for gravitating toward the undead aside, Buffy's love life is pretty successful (minus the whole stabbing her boyfriend in the heart and sending him to hell thing). Still, her love life is never really lacking despite her hefty Slayer duties. See, world? Women CAN have it all.
Willow (played by Alyson Hannigan) is a genius. She loves science, technology, and computers — all things stereotypically dominated by men. She and Hermione Granger would have undoubtedly been the best of friends, because they both are unapologetic about their unparalleled smarts. Willow's also a witch. Oh, and she happens to be gay. See, world? Women CAN be so many things.
Alternatively, one of the only characters without any notable supernatural talents is Xander (a male), whose lack of powers certainly does nothing to diminish his worth to the group. At every turn, the show gave a big "f*ck you" to gender stereotypes.
BTVS wrote feminist female characters with layers (because, spoiler alert, we have layers). One-dimensional female characters and typecasting are a plague on pop culture that the show squashed under its toe — mini Fear Demon-style.
