Definitely check with Cruisecritic. You will find all the information you need.

Its funny how the poster above listed Royal Caribbean and Carnival together, saying Carnival has better food. Shows how subjective it can be because I'd never sale Carnival and the food is one reason. RCCL is much better, but thats just my opinion.

Celebrity is my line of choice but it may not be a great fit for someone who prefers the Carnival experience. Only by reading up as much as you can will you be able to find the "best" cruise for you!