Well, obviously the answer is Steptoe and Son but what do you think?

My top ten

Steptoe and Son
Dad's Army
One Foot in the Grave
Porridge
Till death us do part
Fawlty Towers
The Royle Family
Rising Damp
Blackadder
Hancock's half hour

My favourite has to be father Ted an Irish programme

Mine

The Office
Phoenix Nights
Blackadder
Fawlty Towers
Monty Python's Flying Circus
Early Doors
Knowing Me Knowing You/I'm Alan Partridge
Peep Show
Extras
This Country

I think the top two are my favourites because I find them so relatable, you feel like you have met a lot of the characters. Only Fools and Horses usually gets picked top when they put it to a vote, and I do enjoy it when it's on, but I can't pick a series who's greatest moment is someone falling over. Special mention to Vic and Bob, I probably should have found a place for Shooting Stars in there somewhere.

Couldn’t agree more GRIMMY!

I’ve been weary of the milkman ever since.

Top 10, in no particular order.

Only Fools & Horses
The Office
The Inbetweeners
I'm Alan Patridge
Nathan Barley
Men Behaving Badly
Game On
Bottom
Phoenix Nights
The Young Ones

Steptoe and Son (not # 1 for me, but of it's time and funny)
Dad's Army (as above)
One Foot in the Grave (Sponsored by RLFans?)
Porridge #1 for me
Till death us do part (no comment, unless ypu like racism and xenophobia)
Fawlty Towers #2, Cleese knew when to stop
The Royle Family (have a word, it's crap)
Rising Damp (as above)
Blackadder (#3)
Hancock's half hour (not a sitcom)

I wouldn't include The Office in any list as Gervais is a (insert word here), likewise Phoenix Nights because of Peter Kay, I would chuck Butterflies, Lovejoy lots of others in there, Red Dwarf, Minder. One thing is for certain, all of them were better than the American garbage we have to flick past now.

Only Fools and Horses.
No question.

Very odd.

So according to you, You have to be into racism and bigotry to like a comedy show that's mocking racism and bigotry?

And you're trying to tell me that the situation comedy "Hancock's half hour" isn't a situation comedy?

Strange that no-ones mentioned the longest running,(1973-2010) and best of the lot, Last of the Summer Wine.
Also Auf Weidersehen, Pet deserves a mention, as well as On the Buses.