Hi, let me tell you about the things my housemate does to annoy me then you tell me what yours do. You can skip my rant, it's well long and boring, and just post your stuff.
1. We have a cleaning rota, nearly ever week she does someone else's turn before we get chance and ticks it off, crosses out the name it was assigned to and puts hers. She doesn't even do it when we're out. I had my nephews over and I was playing with them and she stormed through the lounge with the mop and bucket to do the bathroom when it was my turn AND it had already been done. She did it again last night and was swearing the whole time, I sat in my room chuckling and also terrified.
2. The other week the house smelt of mackerel or something, I don't mind cooking smells but I heard her get up for the bathroom in the night, maybe she thought she was home alone, and she stomped around the place slamming doors at around midnight then I heard her saying IT FUCKING STINKS. I text all my housemates to warn them if they cooked it she was unhappy and it turns out SHE COOKED IT.
3. We have a living xmas tree, she brought it in from the garden and we wanted to decorate it together but there wasn't a night we were all in except very briefly last night. So we started decorating it and she just walked out and went to the shop before joining in, one housemate was leaving for work so we carried on doing a bit with her then we left some to do with mental woman, she came back and said OH! I BRING IT, IN YOU DECORATE IT. Umm. Then we asked where we should hang some of the decorations we made for the house and she just replied 'THE WALLS'