Any bathroom that's within a few steps. Once the universal urge strikes me I ain't picky.
The ones that don't flush automatically -they annoy the crap out of me.
I don't know honestly. I was trying to look up which headlight to order for my car and I must have really butchured the spelling because google did that "did you mean..." thing and it looked interesting whatever it was it thought I meant and eventually I came across this sight. There are aspects of this subject I do feel strongly about so why not try it out for awhile.