What about infamous Trigger lines such as:
"If it's a boy, they're going to call it Rodney... after Dave."
or
Del: "I thought you said it was open twenty four hours a day."
Trigger: "It is. But not at night."
Favourite sitcom phrase Page 4
Blackadder Goes Fourth.
Melchett: Bob is an excellent fellow, he has a splendid sense of humour.
Blackadder. He sir? He sir he?
Melchett: See? You're laughing already.
I want to go to there - 30 Rock
Quote: Leevil @ January 5 2010, 4:25 PM GMT"Bob Loblaw"
Many lolz.
Also Rural Juror.
The Office quiz night episode 'he's thrown a kettle over a pub. What have you ever done?'
Quote: zooo @ January 5 2010, 11:37 PM GMTMany lolz.
Also Rural Juror.
'Right! I'll do it then!'
Quote: zooo @ January 5 2010, 11:37 PM GMTI want to go to there - 30 Rock
Ha, my girlfriend says that all the time. 
From Black Books:
'Whores will have their trinkets.'
And
'Open the bloody wine.'
Spaced 'Twiglets make me violent'
IT Crowd 'Why are you giving me the secret signal to shut up?'
Porridge 'What with these feet'
Royle Family 'I didn't like to root. Not with it being the wedding day'.
I won't write it, it just wouldn't do it justice, so over to Pam Doove...
Quote: Mikey Jackson @ January 5 2010, 10:24 PM GMTDel: "I thought you said it was open twenty four hours a day."
Trigger: "It is. But not at night."
Later on in the same scene:
Trigger: Del says it's allright, lets do it
Denzil: This is Derek Trotter, not bloody Einstein
Trigger: Del knows what he's doing and I don't see what the Beatles manager has to do with it.
Spaced:
"Oh my God......I've got some f**king Jaffa Cakes in my coat pocket!"
Spaced:
"This . . . is the good shit."
Nathan Barley:
'you beautiful mess'