I've cruised solo a few times on
DCL, and I just realized that all 3 were on the Wonder -- a 4-night Bahamas, a 6-night LA-YVR, and a 7-night Mexican Riviera. And even for the cruises in which I've split a cabin with a friend, we usually end up doing our own thing most of the time -- different tastes in excursions, sometimes different shipboard activities, that sort of thing.
The single supplement is inconvenient, but sometimes the pricing's reasonable even with the supplement and I've noticed that lately I'm finding several cruises with supplements lower than DCL's published 175%.
I currently have the Dec Panama Canal cruise booked (as 11C, not the restricted IGT) because the price seems too good to pass up, but I may end up switching that to one of the 5-night Canada cruises out of NYC because of the novelty of the itinerary.
And even though I'll be linked for dining with a couple of my friends, I also have my own cabin booked for a September Fantasy cruise. 3 gals in a cabin just seemed too crowded for me the one time I tried it, and single supplement on an inside cabin was more cost-effective for me than even considering 1/3 of a suite for the space.
Whether I'm cruising solo or with friends, I definitely enjoy being a bit of a social butterfly and meeting all kinds of people. It's a blast!