I just submitted my responses. Can't wait to see the results!
I've been GMing now across 40 years or so, and my GM style these days is very different to when I started. These days, I'm much more a "fly by the seat of my pants" GM, with all of us building a story together. I see my role as bringing unexpected elements in to the story we're building, so that the players themselves have a dynamic environment to build their characters against, rather than it just being collaborative storytelling.
I use dice for a similar reason. They allow for the unexpected and for unpredictable outcomes. They mean that the players themselves feel uncertainty when making choices for their characters.
Do you spend more time on encounter prep, or art prep?
That's my secret. I never prepare
In all seriousness, there's a couple of questions like that, asking which type of content I spend more prep time on, but I genuinely don't spend time doing prep on anything, which makes it hard to answer those question. I voted in the middle, but it won't distinguish my answer from someone who does prep, but spreads their time equally.