Simon and I had taken 1 cruise before - Carnival in 1995 for 5 nights. While "nice", it wasn't really anything to write home about.
We decided to run away for Christmas this year, as his parents would be in Australia, and our daughter would be busy working at Universal Studios. Talked to a travel agent that took care of two of our friends. She talked us out of a Disney Christmas cruise - lots of children, not much else.
Settled on Seabourn for several reasons. Primarily, because I have severe food allergies - think anaphylaxis that have recently been diagnosed. As a result, we are more than a bit twitchy about travel. Our TA assured us that Seabourn would be the best choice for taking care of the allergies.