Here's some more quotes I like besides already mentioned (by me
🙂 ) Bad Eggs:
Xander: Are we overlooking the idea that she may be very attracted to me? She's possessed.
Giles: What are you gonna do? Crawl inside a cave for the rest of your life?
Buffy: Would it have cable?
Xander: My dad tried to sell me to some Armenians once. Does that count?
Willow: On the other hand, maybe Rodney just stepped out for a smoke.
Xander: For twenty-one hours?
Willow: It's addictive, you know.
Xander: Private Harris reporting for... Buffy! Lady of Buffdom, Duchess of Buffonia, I am in awe! I completely renounce spandex!
Buffy: Oh, Will, you're supposed to use your powers for good!
Willow: I just wanna learn stuff.
Cordelia: Like how to build your own serial killer?
Xander: Uh, it's so hard to rent one nowadays.
Giles: Quite. And it, uh, acts on-on pure instinct. No conscience, uh, uh, predatory and, and aggressive.
Buffy: In other words, your typical male.
Xander: On behalf of my gender, hey!
Giles: Yes, let's not jump to any conclusions.
Buffy: I didn't jump. I took a tiny step, and there conclusions were.
Spike: Did you see any further? Do you know what happens to Angel?
Angelus: Well, he moves to New York and tries to fulfill that Broadway dream. It's tough sledding, but one day he's working in the chorus when the big star twists her ankle.
Spike: You don't give up, do you?
Angelus: As long as there's injustice in the world, as long as scum like you is walking... well, rolling the streets... I'll be around. Look over your shoulder. I'll be there.
Oz, to Willow: "The monkey's the only cookie animal that gets to wear clothes, you know that? You have the sweetest smile I've ever seen. So I'm wondering, do the other cookie animals feel sorta ripped? Like, is the hippo going, 'Hey, where are my pants? I have my hippo dignity.' And, you know, the monkey's just (French accent) 'I mock you with my monkey pants.' And then there's a big coup at the zoo."
Willow: "The monkey is French?"
Oz: "All monkeys are French. You didn't know that?"
Edit:
Bangelxx agrees: "I mock you with my monkey pants" best quote EVER!
No doubts,
tough, I think there's a tie with "Joyce: Wait till it starts dating" (Bad Eggs) - I ended up with my stomach hurt from laughing too hard.