I have several:
- I hear strange noises from my refrigerator, like something is bumping inside, I open, and there's nothing odd. I'm pretty sure it's the wires connected in the back, but it creeps me the hell out.
- I have a lot of wood floor paneling, and sometimes I hear something creak upstairs when I am in the basement, and I know that I'm the only one in the house.
- I swear stuff is always falling by itself, like brooms, papers, and plastic cups

BTW, I paid for a cheap house to move into, moral of the story, you get what you paid for.