I would like to try one of those river cruises in Europe. Trouble is I don't feel like flying all the way over and back just for a short duration cruise. We did some China back in 1993 but we have really wanted to get back and see more. As years go by though my wife can't get around as much as before and it appears the itineraries we like in China involve great amounts of walking, which more than likely leaves China again out for us.
We were on part of a world cruise in January and Feb which gave me an opportunity to evaluate these more thoroughly since I began to focus on the merits and dismerits of booking the entire package if we had chosen to do so. We have never booked an entire "world cruise". My advice to those just beginning cruising careers, if they can make it work, take a world cruise as soon as you can, that way most ports on the itinerary will involve first visits making the voyage that much more enjoyable. I did note on that voyage over 80% of the guests were taking the entire 111 day world voyage and out of those there were a lot who love to do this time and time again regardless of the number of visits they may have had at the same ports. In our case we find very few ports we haven't been to before at least once on these world itineraries. We even met couples that have been on more than five and often they were friends with others that had been on the same voyages. Camaraderie was a big inducement factor. Obviously, cruising is not the same for all, there are many types and variations. However, we see now the world cruise probably isn't for us. We do love sea days and you do get a lot of those on world cruises, which is a plus for us.
Too, it does seem to me that the industry is rather coy in describing "world cruises" or "world voyages" as these are somewhat misnomers. The one we were just involved in was indeed a cruise that went all the way around the globe, beginning and ending in Florida. However, to call this a "world cruise" is rather disingenuous. 20 of the 47 ports are all in the Mediterranean, there is no Africa, no South America, no---Indonesia, Asia, Malaysia, Baltic, British Isles, Holy Land, Antarctica or Arctic or much more, most all of it is confined to traditional tourist haunts within the Northern Hemisphere, with the exception of a jaunt down the Pacific to Australia and then back north.