Nadia/Shuri
I like to build artificial environments for simulating theoretical models when I'm working with that sort of theory sometimes. Of course, you do come across the problem where you have to understand a field quite well to create an environment with a workable level of realism and by the time you know it well enough you may not need it anymore, but it's very useful for exploring new possibilities in a pre-existing field.
No, I haven't. We get plantains at home more than bananas.