Ive sailed on Allure twice, and Oasis once.
We are not room dwellers at all. Legitimately the only time we are in the room is to change, get ready for dinner, and sleep.
First Cruise on Allure, we had an Interior room. For 2 people, it was adequate, but perhaps a tad small.
Second Cruise on Oasis, we discovered the Front-facing oceanview rooms. Absolutely wonderful, because we had all the room of a Interior room, plus a whole bunch more floorspace, due to the angled front wall, that has an approx 24 sqft window.
Third Cruise on Allure, we had the exact same room we had on Oasis.
Room size is objective. Ive also Sailed on Empress, and Majesty with 3 people in the room. Empress was an oceanview, and was fairly cramped, but not awful. Majesty, we had a Junior Suite, and it is slightly smaller than a Balcony room on Freedom class and larger, however the bathroom was larger.
I dont like having specific plans on vacation, however, we booked everything as soon as booking opened, including My-time dining. At that point, if you make the shows, you make the shows. if not, thats why there is a stand-by line.
First day onboard, before the muster drill, I usually wander about, and find where all the busiest bars are. Those bars tend to be just as busy throughout the trip, so I avoid them.
We are yet to have a bad experience on an Oasis ship. Hopefully that continues with our cruise on Symphony next spring in a Oceanview Balcony room!