Excellent question. The short answer is everything. Designers are writers. Which means we have too many ideas and-OH HEY WHAT’S THAT?!
And that’s the point. Everything we watch, read, listen to, play, hell even EAT, is going to affect how we design in some way. And yes I do have an idea for a near future game set in and around a zero-contract food delivery service and the under the counter extra jobs drivers take. Not that I’d ever use Deliveroo, I believe in paying people a fair wage, but I made really good (I mean REALLY GOOD) egg sandwiches for breakfast this morning and that got me thinking about food delivery services and how they don’t do breakfast and…there you go.
The pretty answer is this. Click on that, it’ll go through to the pinterest boards where I’ve tracked every comic, graphic novel, movie, TV show, book, game and audio drama I’ve interacted with over the last few years. You want a comet trail of inspiration, it’s there.