Well, I grew up in a house where, if the telly wasn't on when my dad got home from work he would ask 'is it broken?' in tones of horror...
I got v. good qualifications, have a satisfyingly high-powered job, count horse-riding, pottery, amdram, reading and dancing amongst my hobbies so I don't see that tv made me a couch potato or stopped my brain from somehow working properly.
I confess that dd watches Cbeebies for an hour in the morning and an hour in the night. She will sometimes ask for it on during the day but I can usually distract her with something else (unless I'm trying to get something done and then I succumb) and, even when it is on, unless it's Justin and Sarah Jane, it's very much background noise to her - she only really pays attention to singing and music (and Justin...)