Wow, that's a loaded question.....
I would definitely say my most favorite cruise of all time was the very first Panama Canal Cruise in May, 2005. We had been on the disboards the whole year before we went and felt like we knew everyone before we cruised and the disboard groups always make our trips even more memorable. There were so many "firsts" on that cruise that
DCL had never experienced before and it was 14 nights! At first we didn't know what we would do on a ship for 14 nights, but through the disboards we planned so many activities, we didn't have time for everything.
But, I love all the LONG cruises. Being on the ship for 3 or 4 or 7 nights is just way too short. The longer cruises are just more relaxing and enjoyable.
Our first long cruise (the 10 day Christmas Cruise in 2004) is when we met Mark and Mary and many others who we have now become cruise buddies with. It ends up like you are having "family reunions" when you cruise together again.
The thing I like most about cruising is getting on the ship, relaxing or doing as much as I want, reading a good book and reuniting with old friends, cast members (who are like family to me now) and meeting new friends. The disboards have definitely been that link for new friendships that will last a lifetime.
If you want to do a longer cruise, I would definitely recommend on going on the ship that repositions to Southern California once the new ships start coming out in 2011. The transatlantic cruise was wonderful (6 days at sea), the Med cruises were great (but no downtime for relaxing, different ports every day) but the Panama Canal cruise was just right in terms of ports and sea days. And the historical aspect of the canal and experiencing the ship doing the transit through the canal is an awesome experience. I would recommend it to anyone who hasn't gone through the canal. And, who can beat a deck 9 BBQ all day while transiting through the canal.
Okay, I'll get off my soap box now. Can you tell I love to cruise?