I haven't sailed since the start up and have only ever sailed Princess so I don't know if my opinions apply.
I like the whole experience of cruising. Princess, in general, fits my style. I find the atmosphere to be easy going and relaxed. Love the itineraries. The food works for me. The entertainment has always been good. I have especially enjoyed the string groups and pianists that play around the ship. One violinist comes to mind. He played so beautifully it made my heart ache. And the staff have always been top notch IMO. I don't care for the bigger ships and will probably just ignore the Medallion thing. Seems unnecessary and needlessly complicated. Technology is not why I cruise.
Having not sailed another line, familiarity comes into play in the way I feel. One cruise we spent 4 days pre-cruise touring London. The city was great, but we had chosen a hotel (for the location) that was less than what we were hoping. We won't be staying there again.
Anyway, when we finally got onboard we went immediately to our cabin. Opened the door and there was this huge Ahhhhhh moment. Felt just like coming home. And that's how Princess feels to me; getting to travel the world from the comfort of my home.
From what I've been reading lately that may have changed. Or maybe they're just not up to speed yet after the shut down. That's my hope anyway.