We usually turn the soundtrack off and the close-captioning on when he's in bed, though not always. Not for Twins of Evil, for example.
As for animation vs. live-action, I've just very rarely seen him react to a live-action film with the same great love he feels for certain animated ones. He used to like Mary Poppins and Chitty Chitty Bang Bang, but basically only for the musical numbers, whereas with animated films like Aladdin (yes yes, I know, but he likes it), he's actually picked up the dialogue and gone back over it again and again, no matter whether or not music is involved. Same thing for Princess and the Frog. (OTOH, we took him to see How to Train Your Dragon and he was strenuously bored, mainly because he worked out pretty quick that there were never going to be any songs at all.)
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As for animation vs. live-action, I've just very rarely seen him react to a live-action film with the same great love he feels for certain animated ones. He used to like Mary Poppins and Chitty Chitty Bang Bang, but basically only for the musical numbers, whereas with animated films like Aladdin (yes yes, I know, but he likes it), he's actually picked up the dialogue and gone back over it again and again, no matter whether or not music is involved. Same thing for Princess and the Frog. (OTOH, we took him to see How to Train Your Dragon and he was strenuously bored, mainly because he worked out pretty quick that there were never going to be any songs at all.)