best comedy tv series.

Father Ted
Coupling
The IT Crowd
Fawlty Towers
Not the 9 o'clock news

and I've probably missed a few others. I struggle to enjoy stuff from the other side of the Atlantic, but The Big Bang Theory often hits the right nerve.

Mash
Fawlty Towers
Red Dwarf
The Office
Mighty Boosh
Coupling (Jeff was hilarious)
Father Ted

Seinfeld
Family Guy (but not season 7)
American Dad
Fawlty Towers
Blackadder (post season 1)
Mr Bean
Red Dwarf

edit: Black Books is pretty good too.

Originally posted by leestatic
Family Guy
Red Dwarf
Father Ted
The Inbetweeners
Aqua Teen Hunger Force
King Of Queens

Originally posted by Blackamp
Seinfeld
Family Guy (but not season 7)
American Dad
Fawlty Towers
Blackadder (post season 1)
Mr Bean
Red Dwarf

edit: Black Books is pretty good too.

Originally posted by generalissimo
mr. bean is funny but there's not much talking going on, its weird.

Monty Python's Flying Circus
...........
Blackadder (post-season 1)
Fawlty Towers

All In The Family
The Bob Newhart Show
Sanford And Son
Welcome Back, Kotter
Laugh-In

Edit: almost forgot - Gilligan's Island

How could I forget The Young Ones!? Had fun watching that one drunk back in the 80's. Made no sense but was funny as hell.

Bottom
Red Dwarf
Father Ted
Seven Periods With Mr Gormsby

I can't believe Trailer Park Boys hasn't been mentioned yet?

Trailer Park Boys
The Office
Extras
Southpark

'Pikeys in Nikes' and other bare-knuckle YouTube classics:
YouTube

The Honeymooners
All in the family
The Dick Van Dyke show
The Mary Tyler Moore show
The Simpsons
Mary Hartman, Mary Hartman
Roseane
Firnwood Tonight
Monty Python's Flying Circus

I forgot to mention two and a half men.