Um, the only time I've had a bad experience was on Crown Princess..
I was in the elevator one of the one's facing the atrium so it was clear and when it wasn't in the atrium it was black and bubbles ( ok you guys probably dont understand but mel probably does haha) so i was in there and i heard water so i thought the bubbles were making sound effects now until a whole bunch of water came pouring down .. NOT FUN! It took them awhile to close down the elevator..a pipe broke on the BAJA deck..but I was not happy at all.
Thats probably the only bad thing I can think of, besides some of the people at the pursers desk being very rude.
none at the moment =[
-Ocean Coral & Turquesa Resort; August 2009
-Mariner of the Seas; August 2008
-Explorer of the Seas; July 2007
-Crown Princess; July 2006
-Voyager of the Seas - July 2005
-Disney Wonder - November 2001
-Big Red Boat..not sure when