KMD

Hello fellow cruiser!  They way I pick my room is by looking at what's above me and what's below me deck wise.  I think a deck sandwiched in between other cabin decks are the best.  Then I usually stay towards the aft (rear) close by the elevators.   You have to be careful not to pick a room if the deck above you is a bar or dinning area or night club since you may hear noises from above.  Some people don't really care, but that's how I decide.  I also rather be on a higher deck as well.   Deck 8 or 9 is good depending on the size of the ship.  

We'll be on the Adventure the end of May - we're on Deck 8 almost exactly in the middle of the ship

We chose deck 7, just aft of the hump, for our October cruise. Cabins above and below. Close to the Windjammer, not so close to Schooner.

I'd look for a room near an elevator bank with other staterooms on the decks below and above your room. That's really the only criteria for my room searches.

12 forward is convenient to the pool deck.  
6 is convenient to the Promenade.