You did say all cruise lines right? Im trying to remember the site for the secret cabins for Disney, like some that have some obstruction they downgraded a category or two. the top inside category has a few secret port hole cabins. The sideways cabins that are a cat 11, have all the amenties of the 10s? or something like that, they have the steamer truck that the other 11s dont have and people say they are more roomy.
I found the link thru this site, since you are the mod here, if Im not allowed to post this, just remove the link, but they put the link and info about secrets all the time.
edited because forgot how to post URL