This is what I noticed on my cruises for deck space:
on Radiance ships (We go on Jewel in December. Think Serenade, Grandeur). DH and I tend to go on the upper decks to sit and relax
on Navigator we found quieter spots on the upper decks away from the main pool.
“chair hogs” tend to be around the pools, so for more space we go to the upper levels.
can’t help on the Oasis ships, we haven’t been on them. Too many kids for us. 😉
hope that is what you’re looking for. Gabrielle