I like Royal Caribbean but as Vietvet said, you get more for dollar on Carnival. Sometimes the prices are lower on Royal but most of the time they are not. I feel that both lines offer a very similar product and the differences are not big enough to make the extra cost worth going with Royal. I have a family of four. So when we cruise the difference is multiplied by four. If it were just the wife and I it would not be such a big difference...
But the great thing is that with all the cruise lines to choose from there is something for everyone's taste. Not everyone will agree with what I said above and there are those that will even think Royal in not up to their standards...
Carnival Cruise Lines:
Fantasy 90, Celebration 95, Victory 05, Conquest 05, Spirit 6/06, Freedom 6/08, Holiday 7/08, Victory 6/09, Valor 9/09, Dream 6/10, Splendor 8/10,Conquest 8/11,Magic 11/11,Triumph 4/12,Spirit 7/12,Freedom 11/12, Triumph 2/13 - The fire cruise
NCL Dream October 2006, RCCL Mariner OTS June 2007