I wish my state would jump on the bandwagon and offer an X. For me, it would mean no pressure, no expectations.
I updated all of my markers to stick it to the man, and I am currently so not passing.
I also like the notion of having a third option, because it's making something other than the binary slowly visible.
Even if, for social purposes, I'm living and passing "as male," I still have to move through the grey space between the binary to get there.