We haven't sailed RCI in almost 12 years, but we live in Florida and we would many times spur of the moment drive down to port and take a 3,5,7 day cruise on both RCI and even Carnival! It was just so easy! Actually I don't believe Pinnacle was even a thing when we last sailed on RCI. Many of our sailings were with our family. We like to try out different expiriences, having also sailed on Cunard 5 times, MSC 3 times. In 2010 when we first sailed on the Ruby Princess we were very pleased with the Princess product. A few more cruises and we were hooked on Princess with a sprinkle of the others in there! We just love their itineraries, the price point, the onboard culture, the crew, the staff, etc. Is it perfect...no way, but we feel at this time it's perfect for us!
BTW, one of my best friends sails almost exclusively on Celebrity but she's a gambler and likes the smoke free casinos. Not saying there was anything wrong with Celebrity and we may try it again but right now we're content with our choice.