My wife and I and my brother and his wife sailed from San Diego to Hawaii return leaving March 4, 2013 on the Celebrity Century. We each had an oceanview stateroom on deck 4. Normally I book a balcony on a high level but was very pleasantly surprised at how the lower decks allow you to 'interact' with the ocean rather than just looking waaay down on it. We even saw dolphins playing in the bow wave out of our picture window, seemingly just a few feet away. I might do the lower levels more often now. (The lower decks experience much less movement in rough seas than do the leveraged higher decks.)
The Century is an older and a small ship but the entire crew meets your eye and greets you everytime you pass - very impressive compared to some not so friendly experiences on other ships.
Our first couple of nights out of San Diego were a bit rough but the ship mostly rocked rather than the more troublesome to landlubbers rolling. But the rest of the trip, including the entire return was almost smooth sailing.