Oh, I LOVE British humour! It's most like my own. Most Americans are idiots so it doesn't surprise me that they don't "get" it. (I know, not very loyal of me, but, sadly, it's true.) I think I was British in another life--the very first time I landed at Heathrow I felt like I had come home. I loved Black Adder, Absolutely Fabulous, The Kumars at No. 42, Graham Norton, The Office, Little Britain, etc.
Now, of the shows you've listed above I have seen:
Robin Hood (LOVED IT!!! Is it wrong that I was rooting for Marian to choose Guy??? )
Little Dorrit (love Matthew MacFadyen--have you seen Perfect Strangers? )
Bleak House (very proud of Gillian Anderson in this role)
Some seasons of Spooks (still working on them--great show and am so happy to see Richard Armitage in it!)
I have not seen Doctor Who yet but it's a show I've certainly heard of and have been meaning to get into.
I was once at a convention around 1984 or so where Jon Pertwee was one of the guests. I kept running into him in the hallway. I wish now I had asked for his autograph! He seemed like an affable fellow.