It was interesting to confirm my suspicion that the older HAL ships have higher space ratios (with some exceptions) and that the new larger Signature class ships have lower space ratios. It was also interesting to compare HAL to other cruise lines. Carnival did not fare well with regard to space ratios. Disney ships, on the other hand, were better than the other large ships.
The small premium ships were hit and miss. Most were very good, but a few were no better than the large ships. The riverboats were very tight, but those are generally port intensive journeys.