I think Nolan is obsessed with time because films are a visual art that exists in time. It's not painting, or sculpture, or photography. Film is the manipulation of images and sound in time to elicit an emotion, elucidate an idea, and / or tell a narrative, so making his subject time allows him to experiment with the form on its most fundamental level.
My vote goes to Dreamcatcher, an astoundingly terrible movie considering the pedigree of those involved. It's bad at a high level of execution.
Pretty much the same as Dan Harmon's Story Circle, which is even more concise, and more focused on character.
Makes about as much sense as saying you need to be a gourmet chef to know wether or not food tastes like crap.
Here's a film you can support, starring several people of color, made by an Afro-Latinx filmmaker who wrote, directed, shot and edited it himself with the change in his pockets.
Google Play: http://tiny.cc/0b25gzAmazon Prime: https://amzn.to/2WpbAYm
This won't have bad, unintended consequences at all.