I prefer not to sail on the same ship but, of course, I have. I have sailed on HAL's ms. Amsterdam twice and am booked again in 2018. I like the thrill of exploring a new ship. However, I also feel comfortable being familiar with a ship. So, it can go both ways. If I am sailing the same ship, then it is important to be to be going on a different itinerary. This was true for my second trip on the ms. Amsterdam, and will be true for my third cruise on her. My next cruise will be on her sister ship, HALs ms. Rotterdam. Although not as exciting as a completely new ship, she will have a different decor. Every cruise is exciting for me.
In fact, I think that my first cruise was a bit intimidating. We were a young family at the time. I didn't know if I would get seasick, fit in, have the right clothes, find my way around the ship, not be embarrassed by my kid's behavior, get the food that the kids liked to eat, be able to relax, etc. Everything went so smoothly. I only saw my kids at meal times. The servers were so great with the kids. I knew after that first cruise that I was a born cruiser.