We started out with a 7-night cruise and found that it wasn't long enough, so we increased the cruises and went on a 11-day cruise. That was okay, but we decided to do a 12-night cruise. I personally found that too long. It probably didn't help that I got sick on the last two days on the ship either.
We were home for a whole week and my husband was ready for another cruise! I was not!
We are now scheduled for a cruise in March 2008 which I find too soon personally as we just completed a cruise in November.
I think an 11-night cruise for me is just right.
Big Red Boat
Carnival Jubilee 2004
Carnival Valour 2005
RCCL Empress of the Seas 2006
RCCL Brilliance of the Seas 2007
RCCL Grandeur of the Seas 2007
RCCL Jewel of the Seas 2008
RCCL Explorer of the Seas 2008
RCCL Explorer of the Seas 2009