So the Nintendo Switch came out last week and, as one of the most malleable consoles ever built, it makes sense that people would want to mod the crap out of it.
Ergo: there's already a ton of 3D printable accessories.
I found a bunch of pretty interesting models here. Some seem ridiculously stupid, others actually look like something I'd consider using.
Like this one:
This one seems a bit more functional:
This car mount seems a bit average, but I reckon I would pay good money for an official, well-made car mount for the Switch:
There's also some pretty cool analogue stick extenders, for people who don't like the feel of the Switch's controller (I do, so I would never bother, but your mileage may vary.)