We have cruised on Princess, Celebrity, Holland America, and Norwegian. These bigger ships were fine for a family cruise but on our last Princess cruise through the Panama Canal (as a couple) I lost the desire to cruise on a large ship again because many people got sick and I tired of the mediocre product.
The antidote to these ships is Seabourn. We left Barcelona on April 21 for the cruise of a lifetime. Everything about the Seabourn Legend is upscale. The experience spoiled me so that I won't consider a big ship again.
Seabourn solves every problem I have with big ships. First, there are never, ever any lines. No lines at the purser's desk or excursion desk. No lines embarking. No lines disembarking. No lines going to dinner. Just forget about ever having to queue up.