I quit watching TV mostly because of ads. The breaking point was when they started to show ads in the upper or lower frame two minutes before the regular break for ads.
Besides that here in Germany they love to edit (violence, sex) movies or series so they can show them during prime time. Why watch something that is censored and full of ads when I can just pop in the blu-ray and watch the whole thing without annoying ads? I have no regrets not watching TV anymore since 2005