It's interesting - I find Casualty has absolutely the opposite effect on me.
I adore TV drama, and get totally absorbed, except for Casualty, where I find all of the characters ubelievable, and the dialogue clunky, and the thread that runs through it is - why aren't these people getting on with what they are paid for instead of taking massive chunks of time off to deal with person issues, or devote an inordinate amount of time to one patient.
For that reason - I'm not - I stopped watching months ago.
Ironically, the present Mrs Hughes, who finds almost all TV drama to be unbelievable, is a huge Casualty fan, and is perfectly happy to watch alone while I go and catch up some writing, so we both win in the end.