I'm with you Doggygirl, I'm either an old fart or living in the wrong country because I am absolutely "addicted to Britcoms!"
What can you say about Hyacinth, Daisy, Rose and Violet? They are perfectly cast for their roles. Although I must admit I do prefer one Rose over the other. As for Arnslo, he is priceless. I've seen each episode so many times I almost have the dialogue memorized.
Some of my other favs are: Yes, Minister, and later Yes, Prime Minister (I love Appleby!), Chef (I like the earlier episodes before Janice separates from Chef), Royal Family (who would have thought you could write an entire television series about a family that never gets off the darn chesterfield!?!

), Coupling, To the Manor Born, Good Neighbours, Upstairs, Downstairs, Faulty Towers (Basil is a classic), May to December, and I love Dame Judy Dench and Geofrey Palmer in ??? (I can't believe I've forgotten the name of their sitcom!)
Don't even get me started on British soap operas. I am hooked on Coronation Street, Emmerdale and Eastenders.