Updated with hints, mofos:
1. When a man's partner is killed, he's supposed to do something about it. It doesn't make any difference what you thought of him. He was your partner and you're supposed to do something about it. And it happens we're in the detective business. Well, when one of your organization gets killed, it's-it's bad business to let the killer get away with it, bad all around, bad for every detective everywhere. HINT: film noir
2. Now, what we got here is a little game of show and tell. You don't wanna show me nothin', but you're tellin me everything. I know you know where they are, so tell me before I do some damage you won't walk away from.True Romance, guessed by lazarus
3. There's nothing too small. You know when police find the slightest piece of DNA and build a case on it? If we might see you floss or masturbate that could be the key till your entire reality. HINT: 2004
4. How could I have known that murder could sometimes smell like honeysuckle? HINT: film noir
5. Well, when I see five weirdos dressed in togas, stabbing a man in the middle of the park in front of a full view of 100 people, I shoot the bastards, that's my policy. The Naked Gun, guessed by YLB
6. 37! My girlfriend's sucked 37 dicks!Clerks, guessed by PlaTheGreat
7. I don't swear for the hell of it. Language is a poor enough means of communication. We've got to use all the words we've got. Besides, there are damn few words anybody understands. HINT: courtroom drama
8. Character A: Well, at one time, you've got it, and then you lose it, and it's gone forever. All walks of life: George Best, for example. Had it, lost it. Or David Bowie, or Lou Reed...
Character B: Some of his solo stuff's not bad.
Character A: No, it's not bad, but it's not great either. And in your heart you kind of know that although it sounds all right, it's actually just shite.Trainspotting, guessed by YLB
9. Being suspended is like getting a paid vacation. Why do they think it's a punishment? It's like your dog pees on the carpet and you give him a treat. Then you get in trouble for skipping school, it's sooo stupid! Hendricks told me, "One more time" and I'd be expelled. Sounded good to me. HINT: 1999
10. You're a very nosy fellow, kitty cat. Huh? You know what happens to nosy fellows? Huh? No? Wanna guess? Huh? No? Okay. They lose their noses.Chinatown, guessed by YLB
11. Oh, I love you, Adam, Alex, Peter, Brian, whatever your name is, I love you! I hope we have a lot of boys and we can name them all after you! HINT: set in Paris
12. You know what's the worst thing about somebody breaking up with you? Is when you remember how little you thought about the people you broke up with and you realize that is how little they're thinking of you. You know, you'd like to think you're both in all this pain but they're just like 'Hey, I'm glad you're gone'.Before Sunrise, guessed by NSW
13. Go back to Jersey, Sonny. This is the City of the Angels and you haven't got any wings.LA Confidential, guessed by NSW
14. Will you look at that! Look how she moves! It's like Jell-O on springs. Must have some sort of built-in motor or something. I tell you, it's a whole different sex!Some Like It Hot, guessed by YLB
15. If I could only have one food for the rest of my life? That's easy, Pez, cherry-flavored Pez. No question about it.Stand By Me, guessed by PlaTheGreat