NOt at all, Granny.
There is a LOT to be said for always going with a company where you have had a good experience.
A lot of people do this - when you had a good experience and you want that experience again it only makes sense to go back to the same place.
Cruising is a rare and expensive vacation and you shouldn't take chances unless you really want something different.
I could find different ways to define luxury etc, but I have no reason to tell you your definition is wrong - so, no you don't sound like a cheerleader, you sound like a happy camper.