I sit. Adamantly.
1. I hated having to be the one who cleaned up after the standing men in my household, and I refuse to add to the mess.
2. My cisgendered boyfriend always sits, and considers standing to be just as gross and unhygienic as I do, so I don't really get the whole standing=MANMAN thing.
3. I do not care to try and deal with all those STP devices. I just want to be able to take a piss.