Ardis, I've been on many 14-21 day cruises and I still say our two segments of the WC were more special. The lecturers were better as well as the entertainment. With the profit Regent makes from a WC, it makes sense that they would put the best of everything on the WC.
Of course, we all have different reasons for taking cruises. I like the "community" that happens on a WC where people know that they are going to be together for a long time and make an effort to meet each other. I like interacting with people. It's part of the reason I cruise. Of course, we're all different and not everyone feels that way.
I also like the excitement of a WC. When we left Los Angeles, the atmosphere was absolutely electric as we sailed out of the harbor.
I probably need to post a "warning statement" underneath my name here. Positive, enthusiastic, optimistic poster, reader beware. :D