Because we were done :)
While we were leaving French Polynesia we realized that we had about the same amount of fun left in our cruise as we did money in our bank account. In about 3 or 4 years, depending on how many things went wrong, we would need to head back to land to replenish both our fun factor and our savings. We also knew that our various qualifications in our previous careers were evaporating and so it was a good time to think about returning to work for that reason as well.
At that point we decided we would start keeping our eyes open for work that was both fun AND lucrative. We also decided that if nothing had come up within two years we would start looking for work that was fun OR lucrative and in about four years we would start applying to be greeters at Walmart!
Within the first year we had a number of possible opportunities that were both fun and lucrative, some of which dissolved, one of which suddenly came to fruition. Thus, it was on a high that we were able to finish our cruise - still having fun, still having money, but seeing the end of both in sight.
One of the most interesting things about finishing our cruise is the variety of responses we have had to our stop. The friends who know us the best tell us they are looking forward to seeing what we do next. Many of our cruising friends understand why because either they have finished their own cruise or are seeing their own sense of completion and ending in sight.
Toward the end of our cruise, we were both ready for a change. We were having fun cruising, but we were ready for some other types of fun.
With our years of cruising experience, with the new knowledge of what type of cruisers we actually were (rather than the type of cruisers we guessed we would be from the dock), we were ready also to change boats. Our boat was the perfect boat for our level of experience when we departed, for our ages at the time, and for our first cruise. It is unlikely our second cruise, if we take off again, would be on the same type of boat. We've changed in many ways.