In every instance of shared accommodation across the country, there's always a bad housemate. That one roomie for whom the normal level of cleanliness doesn't apply; who puts more effort into their practical jokes than practical skills like doing the washing up or taking out the bins.
It's no different in the world of superheroes: just because you've got super speed and a secret identity, that doesn't mean you're free from the quibbles that arise in sharing a flat. Take this short from Action Reaction Entertainment, imagining the potential arrangement of Spider-Man bunking up with Thor. Life gets pretty complicated when one of you owns a bloody great big hammer that only you can move.
Oh, and if you can't think who the bad housemate is in your arrangement, it's probably you.