When we had the kitchen redone the plumber asked if we wanted the hot on the left and cold on the right or the other way around. I thought it was a strange request, since most of the time it's hot on the left unless somebody is really lazy and does it backwards (or so I thought).

He told me that while hot on the left is the most common, he gets many requests from people who want it the other way, and has even had people pay him to come in and just switch it in a place they moved into.

If we all can't agree if it's hot on the left or right (I say left) there's no way anything else will be agreed to.