I have a few....
I would add clocks to the rooms.
A new ship that is a bit bigger than the PG, but smaller than the Voyager/Mariner with about 500 people with two basic room types. One type of room like the Voyager basic room and another type like the Penthouse suite layout on the Mariner, with the bigger deck for those who want more room. There should, I guess, also be the usual Master and Owner's suites. It should be as smooth as the Mariner, with the coffee bar set-up of the Voyager and a beautiful dining room like the Diamond. Flat screen tvs and DVDs in every room too. And all of you on the ship with us!!
A Nobu restaurant like Crystal.
And what Karen said!! I would like Tahiti and Hawaii. It would be great to start in NY and/ or LA and go directly to French Polynesia for a week. Then do a tour of all the Hawaiian islands for a week. Spend a few days in Hawaii or FP pre-or post cruise. Then fly directly back to NY and / or LA. This would be about a 2 week cruise. Just perfect.