Sewing projects. I dream them up, figure out how to make them reality, and then spend hours waiting on my assistants to stop helping me so I can get another step done.
These projects are more technical, but since the printer doubles as a Scary Monster according to my would-be assistants, the only delays are caused by me not sitting down and doing the thing.
Tasty. No feline assistance whatsoever, even when they want to help.
There are always new hobbies or new things to try.