Peepshow, That Mitchell and Webb Look, and almost all of their side projects together and separate (for instance The Bubble). Newswipe (and Charlie Brooker's other "wipes"). I really love Charlie Brooker. Russell Howard's Good News. Outnumbered. BBC News. Eastenders. Various k-rappy and not so k-rappy series such as Survivors, Being Human, and for contrast The Street. Dr Who (mainly forced upon me, but it grew on me) and Torchwood (my revenge on my Whovian husband is we have to watch that as well). Almost all documentaries even sometimes the ones on Channel 4. The Catherine Tate Show and Little Britain (and practically all sketch shows for that matter). Ab Fab. Coupling. The Royle Family. Life on Mars and Ashes to Ashes. Poirot and some of the other serial mysteries. Yes Minister. How Clean is your House?
Okay, practically everything that doesn't involve dancing or ice or singing in front of a judging panel. I never really got into Big Brother either. I sometimes watch the fix em upper reality shows, but they're not my favourites.
I don't really watch telly constantly, but I love British telly, and if it's on, unless it's something brilliant, a documentary, or something my husband wants to watch from outside the UK, it's usually British.