I absolute hate dubbing, I can understand the need for it when it's movies made for children who haven't learned to read properly yet (but I personally watched movies and shows in English when I was just two years old - didn't understand what anyone was saying, yet, but didn't stop me from enjoying it), and I can tolerate to a degree dubbing of animated movies and shows.
But for everything else, I just can't stand dubbing. It looks, sounds and feels artificial to me - I end up focusing on how horrible the voice acting or how the words are completely out of sync with the movement of the lips, etc, rather than relax and just try to enjoy the show/movie. It might have to do with Norwegian voice-acting mostly being horrible - just a select few times have I watched an animated movie in Norwegian and actually enjoyed the voice acting - and those times they have made sure to hire a cast with a large number of different dialects (and made sure the actors were decent voice-actors).
I think it's important for us to be exposed to languages, when I was little I watched things in Swedish, Danish, English and French. It helped me have less problems understanding Swedes and Danes when they talk to me, gave me early exposure for English and French, which I later learned in school (can't say I'm that good with French, but then again I only had minor exposure to the language and the classes weren't really geared towards actually speaking and understanding the language - too much spelling/grammar focus).
My own nieces now watch everything in Norwegian and I find it such a shame, such a horrible development. First of all there are no real reasons to dub Swedish and Danish if you're a Norwegian. The languages are similar and it's simply culture-enhancing to have that exposure.
I can understand if a person has geniune problems following subtitles, but for the rest of us, I feel it's just people being lazy. You get a better and more genuine experience watching a movie or show in its intended language. Exposure to different languages and culture is a good thing.