The onboard ambiance, the lack of announcements, there's always a ship 365 days a year within a 3 hr flight from my home, , onboard amenities... and a traditional cruising experience.. albeit in modern surroundings.
I have been on Royal Caribbean, Princess, Carnival, NCL and Celebrity. My wife and I feel that things just seem a little more elegant on Celebrity and the food. We want to go on a luxury cruise and feel that Celebrity meets our need.
The excellent service and food all found aboard Celebrity ships at a very fair price. We feel Celebrity give you an upscale cruise without the upscale price. Everyone enjoys good value,and Celebrity delivers an excellent product, ship after ship, year after year.
Kuki, I would say it is the closest thing to a luxury /high end experience at a popular cruise price. Everything, (food , cabin service , table service etc) seems to be done "just right". Note although I prefer Celebrity , 8 of 12 cruises have been on 4 other cruiselines.