Well, we all love reading quotes, so I figured I'll put some up. Feel free to add any.
~ WickedChick

Det. Stella Bonasera: [after finding out that a mattress that they know a girl died on has no bloodstains on it] What do you do when you can't get to sleep?
Det. Mac Taylor: Work.
Det. Stella Bonasera: What do *normal* people do when they can't get to sleep?

Stella Bonasera: What time did you get in?
Mac Taylor: I never went home.
Stella: Can't sleep?
Mac: What's sleep?

Danny: Good morning, dear.
Stella: Do I have a tail back there?
Danny: Sorry. Good morning, Stella.
Stella: Better.

[ A skeleton has been found on a tour bus in Times Square. ]
Stella Bonasera: How long is this tour? (Mac looks at her disbelievingly) That's funny.

Flack: Typical club death. 200 people inside, none of them saw anything.

Stella Bonasera: There's something gooey here.
Mac Taylor: Gooey? There's a good forensic word. Gooey. I'll have to use that more

(Mac who previously made fun of Stella for her use of the word gooey, uses it himself.)
Mac: Some sort of 'gooey' residue on the top of the piece of paper.
Stella: (smirks) Great choice of words.

Mac: A paranoid schizophrenics worst nightmare.
Stella: He doesn't just think we're out to get him. We are.

Flack: We sent the world out and got next to nothing. I spoke to a lot of eyewitnesses. I got everything under the sun. He was shot from a tree. He fell off his horse and shot himself. One lady said aliens came down. This city's full of nuts.

Aiden: Anybody see anything?
Flack: When does anybody ever see anything?

[Stella sees a Derek Jeter bobblehead on the dashboard of an SUV she and Mac are processing]
Stella Bonasera: Who is that on the dashboard? Mickey Mantle?
Mac Taylor: Looks kind of like Derek Jeter.
Stella Bonasera: Derek Jeter from the Yankees, right?
Mac Taylor: Yeah.
Stella Bonasera: Didn't they get beat by Boston or something?
Mac Taylor: We were up three to zero and then we got swept. But we're trying to forget that.

Flack: Both the super and the downstairs neighbor say they haven't seen her in over a week.
Danny: Yeah, well that don't mean anything. I've lived in my apartment over three years now. My neighbors don't recognize me.
Flack: Better hope you don't go missing, pal.

[Danny had a chase scene with Tony who climbed a fence and Danny jumped up and caught him.]
Danny: If there's one thing I hate more than running, it's leaping. You're not my favorite person today.

[Hawkes explains something about brains out of the head being fried.]
Stella: Guess this'll be a no-brainer for you.
Sheldon Hawkes: She did not just say that.
Don Flack and Mac: She did.

[Hawkes is eating in the break room]
Mac Taylor: You on break?
Sheldon Hawkes: I'm just taking five minutes to eat. That's okay, isn't it?
Mac: Eating is frowned upon, Hawkes. (Hawkes moves to put everything away) I'm kidding.

{Danny and Flack, question a suspect}

Flack: Where's your girlfriend?
Suspect: What girlfriend?
Danny: The rubber one.
Flack: Danny! Silicone.
Danny: Oh! Sorry - silicone.

[Jess and Don sitting in the car watching a potential suspect]
Flack: Four older brothers and a detective Sargent for a father? Your old man dust you for prints when you got home from a date?
Jess: If it where up to them I wouldn't have even known boys existed till I was 21
Flack: I bet the boys knew you existed!
Jess: Was that a line Flack? Did you just bust out your game on me? (weepish smile from Don) It was wasn't it? Look at you your blushing!
Flack: What game? I have no game. If I did that's probably as good as it gets!
Jess: I thought it was pretty good!