Holy crap! I'm ALONE in the house?! O.O That like, rarely happens! My current residence always has someone in it at nearly all times, so it is extremely hard for me to find some space and time to be alone and do something in peace.
This is why I'm always online late at night...
Anyway, what would I do if there was absolutely no one in the house save for me? Well, first off I'd be playing me some of my favorite music. I don't play my music out loud (I'll listen to it on headphones if I must) when anyone is around. Out of courtesy I tend to not do this just in case I distract someone from doing something. But when no one is around I will do it. I might even sing out loud to the music if I feel like it. And then naturally I'll play a video game sometimes. I play them even when people are around, but there's some games that I prefer to play by myself (most of the time they are handheld games). And sometimes it is extremely hard to do this when you have a younger member in the household that must look at everything you do, even if it doesn't pertain to them. >_<
I don't really like for people to look over my shoulder especially when I'm trying to concentrate on something. This is why I prefer to play console games when others are around and handheld games when no one will be around to peek in on my playthrough. Not that I wouldn't enjoy having an audience while I'm playing that game, it's just that in order to actually watch me play handheld games, people will have to enter my personal bubble and it makes me annoyed.
And as far as doing anything else goes, I'd supposed I'd do things that I normally wouldn't do with others around, one thing for instance (
no laughing, please...) is that I like to play out certain characters of mine's role in some stories of mine. By doing this, I can figure out how things in a certain scene will go and figure out exactly what a character would say in certain situations. I can't do this with other people around 'less they look at me like I'm crazy.
But when I'm by myself, I'm free to do this without having to worry about people giving me that look.
And I think that about covers it.