I completely agree with you. I personally don't understand why they force people to sit through long credit sequences. Because of the level of detail, I do make myself watch it all the way through just the once, because they do look good. I'm just not interested in the name of the person who picked the outfits and after the one watch I ALWAYS skip the credits.
The only time I keep something playing once its finished is if I like the credit music, otherwise it's off straight away!