Sailed on the Destiny in 2007 with 30 people in our group.  We had an absolute blast from beginning to end.  Going with a group always makes for a lot more fun.  I like Carnivals laid back, relaxing atmosphere better than some of the others I've been on. 

The staff was awesome, the food was good and we didn't even have to hang up our own cloths for cryin out loud (if we left something on the bed when we came back it was either folded or hangin on a hanger int he closet). 

To me cruisin is the ONLY real vacation most women ever get.  No dishes, no cookin, no cleanin.......  who could ask for anything more.   All the cruise lines serve the same purpose but I prefer Carnival.