Most of the time no but it depends. I love narration and internal monologues in the stuff I read, sadly that kind of writing just has to be taken out of the story to make sure they can fit it into 12 episodes... but if I see an adaptation of something I read years ago I get really excited for...
Honestly, sometimes I prefer them to not be voiced. It's nice if it's there but often times the voice acting clashes with my reading speed; too slow when reading something translated and too fast in Japanese. Of course most of the stuff I read is still mostly voice acted.