Basically, just list the odd (or normal) things you do (or don't do) when you're home alone for any reason...
For me, I like to blare my music extra loud. >3<
Sometimes I'll quote sayings from videos in a loud voice and laugh at my own stupidity. ^o^
Or, more recently, practice my Gecko Moria impression.
"Kishishishishishi!"
(By the way, I hate that guy)
So, post here, so I don't feel bad for telling everyone something extremely weird about myself. ^^;