Sure thing! This year will be "Toys and Games" - everything I build will be a project inspired by a video game, a toy from my youth, or will be built out of a toy. Last year, it was "Music" - models inspired by cars from music videos, musicals, TV show jingles/songs, or bands. 2021 was "Unfinished Business" - every project had to be something I had previously started but never finished.
I found it to be a big help focusing both my time and my spending: if I know there's no way I'd get to work on a particular model for months or years, it makes it a lot easier to pass on a new purchase.