+1 for Mother & Son, also;
Mrs Browns Boys (funny new show)
Fawlty Towers
Dad's Army
Kenny Everet Video Cassette
Goodies!
Actually, can't beat the Brits for a good comedy line-up! 
Geez! This this post is full of bloody old stuff. The sad thing is that I remember all of them.
.
The young ones ^^
The comic strip presents.......
Absolutly fabulous
The pommes have comedy TV sorted
If you are keeping up with the US schedule, Cougar Town and Rules of Engagement are well written and funny. Starting watching 'cause the wife and teenage daughter watched them, but found I quite liked them.
Fraiser was a classic - as were the early seasons of Married with Children.
My 14yo son is working his way through all six seasons of Get Smart... still makes me smile when I walk in and see him enjoying an ep I saw some 35+ years ago.
Surprised no one nominated Two and a Half Men. Winning!!
I think the real test is time. I found some eps of Let the Blood Run Free from the 80's so DL'd because we had liked it when it screened. We turned this off before the end of the first ep and deleted the files - terrible!
Portlandia
Malcolm in the middle
My name is earl
that big bang show is torture, not even that hot blonde can convince me to watch it...
