I get this question a lot, and I never have a good answer. The best way to describe it is that it's a tool, so it unlocks a whole solution space that wasn't there before.

Before, I used to live with random little annoyances so much that I couldn't even see them as annoyances. After you get something that can solve all of them, your mind just unlocks.

Toilet seat won't stay up? Print a hook. Taking my glasses out of the glove compartment takes too long? Make a custom glasses holder. The cat eats too much? Print a cat feeder. My USB hub slides around too much? Print a bracket to hold it down. Too many devices on my desk? Print under-desk mounts for them.

The list just goes on and on and on, I've printed probably thousands of useful things, especially for my hobbies.