Well I do know that in either case, if I go from subbed to dubbed or dubbed to subbed, the second always seems less satisfying than the first.
But overall I like subbed better with japanese audio, because all american voice actors sound like they are reading from a childs story book. They can never GET INTO the role. They can never be serious. They all sound like they are reading from paddington bear. That being said, dubbed hentai is fuckin' hilarious.