I'm a newbie to cruising. I did a Carnival cruise a few years ago. It was the only cruise that we could find the fit into the very small window of time the entire family was able to make, plus other constraints. I was nervous about Carnival and the "party ship" reputation, however we had a delightful cruise, peaceful and relaxing. Sure, there must have been wild partying happening somewhere on the ship but it didn't impact my cruise.
I just booked my second cruise, 16 days to Hawaii and back on the Zaandam. I know the Zaandam is a smaller and older ship, I'm good with that. I know there is a possibility the bathroom may not have been renovated, I'm okay with that. I know the evening entertainment may be lacking, I'm okay with that. I know I will have 16 days where I don't have to clean, cook, do laundry, meal planning, grocery shopping, think about work, think about the million and one things that I need to do, and I'm ecstatic about that. Maybe the service isn't up to par as before but it should still be better than having to do it myself. Maybe the food isn't as good as before but I bet it's better than my cooking.
My expectations are most likely less than the experienced cruisers, since I don't have much comparison to a "before" but gosh darn it, I plan on having a wonderful time and fully expect to go on future Hal cruises.