I almost always have onions in my kitchen; usually a few white and red onions, and sometimes shallots. But as much as I really love shallots, I have a tendency to forget about them.
However, thanks to a recent grocery shopping mishap where my fiancé mistakenly bought a dozen shallots instead of a dozen scallions, they're fresh on my mind, and making me consider the possibility of using onions and shallots interchangeably in recipes.