There is definitely an element of feeling at home with one line. Our first Radisson cruise was in 2000, on the Paul Gauguin (still our favourite ship.) Our first post-pandemic cruise is coming up in three weeks on Splendor. We may find that ship too glitzy, we'll see, but I doubt it. Aside from the non-Regent Paul Gauguin, we've done one Seabourn, one Oceania and one Azamara, all nice, but on Regent all the buttons are pushed, including great cabins, wonderful service, small quiet ships, a wide variety of cuisine, and best of all, an interesting and varied passenger mix. (I must say this last was true on the others, except for Oceania.)