My favorite is apparently the one known as the "secret" bathroom - which makes sense. I like it because it's generally not-so-well used, and therefore both available and less icky. Although I have a soft sport for anything Alice, so sometimes I have to visit the redone bathroom in Fantasyland.
I honestly don't know where the DCA bathrooms are. I'm usually not over there long enough to use the restroom. There's the ones in San Francisco (which seems to exist only for the bathrooms), the ones by the entrance, and the ones by Off the Page. That's about all I know.
just avoid the ones at Condor Flats or by the entrance - use any others. those are the only ones most people know about, and as a result they're the most crowded usually the least clean.
I will also say I went to the restroom in Toontown the other day and it was quite filthy so I will try to avoid that one again. but at least there was a CM in white who almost knocked me over in a rush to get in and start fixing up the thing. I did an over the shoulder glance and it was already looking better by the time I hit sunlight.
The hard part living 2 miles from Angel Stadium, 4 miles from DLR is deciding what to do next.