My family has some of their own ideas. Janelle, in particular, wants an art studio that has its own entrance and is large enough host art classes or groups. She would also like it to have its own sink (and perhaps washing machine). Meanwhile, Connor has wanted to add a tower with multiple alcoves.
There's also been discussion about a walkway connection to the garage, a greenhouse addition somewhere, and a deck that comes off the second story of the house. All of these are fun to think about, but I'm not certain about their practicality. Still, this house clearly went through these kinds of additions and changes since it was first constructed--our master bedroom used to be a garage, for instance. Who knows what it will look like in the future?