Nesting Bowls

Now that I've spent 2 days in the kitchen, I have realized two things:

1. I need a double oven if I plan on baking this much again; and,
2. I love nesting bowls.

What is it about these that makes me love them so?? They are incredibly practical, easy to store, fun to use, and, if you purchase a good set, they're cute too. I have my green William Sonoma ones; a set of glass bowls that go so small, and a ceramic set from Crate and Barrel.