We have the entire top floor where I work and there are no handicapped people in our office.
I only use it for a duece. But I always head straight for it even if the other 2 are vacant. There is more room to stretch out, you can get further away from the wall of the one next to you, and it is more private.
I historically hate people who park in handicapped spaces who are not handicapped or those who somehow got the rear view mirror tag and then get out of the car walking just fine.
I guess it started with having to take the kids to the bathroom and the handicapped stall is much easier to get all three of us in there.
But I just have to use it at work. And it is usually much cleaner too. Nothing wrong with wanting to be comfortable when duecing, right?