From the harvest:
Boy: Why was she kicked out?
Cordelia: Uh, because she's a psycho loony!
Willow: No, she's not.
Cordelia: What?
Willow: She's not a psycho. You don't even know her.
Cordelia: Excuse me? Who gave you permission to exist? Do I horn/hone in on your private discussions? No. Why? Because you're boring.
Harmony: Okay, I think the program's done.
Cordelia: Finally the nightmare ends! Okay, so how do we save it?
Willow: Deliver. (She walks away).
Cordelia: Deliver? Where's that? Oh! (Deletes program, slowly realizes what she's done).
Some random one-liners I can recall at the moment:
"I'm not exactly quaking in my stylish yet affordable boots here."
"What he lacks in smarts he makes up in lack of smarts." (Xander).
And my favorite Riley scene ever:
Riley: Hey, Buffy. What's up?
(Buffy turns back, staring at the dress)
Buffy: Riley, look — aren't they beautiful?
Riley: Um, yeah.. they're nice. A little dressy, maybe.. for school, but..
(Buffy walks towards him)
Buffy: Riley..
Riley: Buffy?
Buffy: I really like you. I hope you know that you mean a lot to me, and if things were different—
Riley: Different than what?
(She takes his hand. He looks rightly confused)
Buffy: I want you to promise me that we can always be friends, and I'd really like you to be there on "The Day".
Riley: The day when..
Buffy: The wedding!
Riley: The wedding. What wedding?
Buffy: My wedding! I'm getting married — can you believe it?
Riley: I don't think "no" is a strong enough word.
Buffy: I know! It's crazy! I mean, we fought for all these years, and then.. Sometimes you just look at someone, and you know.. You know?
Riley: No..
Buffy: I think maybe we fought because we couldn't admit how we really felt about each other.
Riley: (Confused) Can we start again?
Buffy: You'll really like him. Well, nobody really likes him..
Riley: I just need to clear a few things up..
Buffy: I don't even really like him..
Riley: Buffy..
Buffy: But.. I love him. I do.
Riley: Who?
Buffy: What?
Riley: What's his name?
Buffy: Who?
Riley: The groom.
Buffy: Spike!
Riley: That's a name?
Buffy: Don't be mad.
Riley: I'm not mad!
Buffy: No, you are mad!
Riley: No, I am! Er.. I really.. Wow. Who is this guy? Does he go here?
Buffy: Spike? (Laughs) Oh, no.. He's totally old.
Riley: Old.
Buffy: Well, not as old as my last boyfriend was.
Riley: (Befuddled) Okay.. It's late.. and I'm, I'm very tired now. So, I'm just gonna go far away and be.. away.
Buff: But—
Riley: No, stay.
(Riley walks off, looking extremely confused. Buffy just stands there, watching him go, a forlorn look on her face)
Buffy: You're ruining my happy day.