I can't imagine most who are genuinely incontinent would find diapers "fun" in the strictest definition of the word, but like others have said, there are benefits,
NotTheAverageMan wrote:
... you don't have to worry about filthy restrooms anymore...
Yup. My Girlfriend walked into Subway to use the restroom not too long ago, and I was going to try to void like I normally do when I'm around a toilet, and after she came out she told me how it was the worst bathroom she had ever been in. Feces on the seat and wall next to the toilet, vomit in the sink. And a smell you couldn't bear. So yea, I joked a little bit with her how this was one of the few incidents that being diapered has its benefits.
No matter what I do I seem to get either a diaper rash or yeast infection once a year. When it's in the moderate stage, it's unbearably itchy. When it's in it's worst stage it's itchy and painful. Only remedy that treats it is Nystatin. So even if every other aspect of diapers were "fun", the scales would still not tilt in the favor of fun