That is a hard one to pick, since all of our Celebrity cruises have been outstanding.
If I have to choose it would be the Mercury April 2001 Panama Canal.
There were six couples we met through the message boards and keep in touch all the time via e-mail. Have cruised with these folks on separate cruises since then. These people were from England, Hawaii, California, Colorado and New Jersey. And most of all the Captains wife who was just the greatest person from Greece.
Not only was the Panama a wondrous cruise but these folks made it very special.