I leave it down because, being a woman, I have no reason to put it up unless I'm cleaniing it. If my husband leaves it up that's fine with me. It's no more trouble for me to put it down than it is for him to put it up.
When I was much younger I used to demand that the seat was put down. As I got older I started to think it through and it dawned on me there is some sort of arrogance about that particular demand. As a woman it is more comfortable for me to go into a toilet and have the seat down and ready, however for a man that is not convenient at all. Then it occurred to me why is my toilet preference more important than my partners? So at home, after I have used it I leave the seat up ready for my partner. In a public toilet I leave the seat and the lid down for whatever gender.
I honestly don't care about it much - I tend to keep it down, but if I/someone else doesn't, it doesn't seem to bother me. It's not hard to adjust it to your liking - just raise it up or bring it down.
I always leave it down, because I am female.
The male in the house always leaves it up.
Never worries me one little bit, I'm going to wash my hands anyway, so touching that seat is fine.....to put it down.
Let's face it, I have never met a man who put's it back down,so why should I put it up!
There is no rules, we must learn to live with each other..... up or down.
We have a household of 2 males and 2 females.
The males are gentlemen and ALWAYS put the seat down. I taught the boys from day one (Father and Son). Do unto others....because at least once a day they also need it down. Majority wins!!
I don't really care that much. If it is left up it doesn't really worry me because when both the lid and the seat are left up, I don't have to consider doing toilet checks to see that the bowl is CLEAN of all debris. I have been thoroughly annoyed if, on lifting the lid and the seat to find that the previous occupant has not left the bowl clean. In fact, I can become quite aggressive about it. I have been known to ask, in a room full of family members, just who the last occupant was and whether they would mind revisiting and cleaning and if they don't feel like revisiting, then they should consider never reusing that area. There is always the area alongside the back shed in the garden.
Seat down. Lid up. We have two toilets, one each, so we don't have any issues. I'm with Jennifer . . . . lid up means no mould. Plus . . . . I hate a closed lid anywhere . . . . I don't like surprises and I don't like to touch other's lids.
Feng Shui dictates that the seat should be down with the lid closed or your money goes down the drain, so this is how we leave ours. We think it looks neater. My husband and I are photographers and artists and attention to detail is important to us.