I think I'll have to create many more custom filters, which may also add to clutter.

My only hesitation is whether or not continuing to use Labels for additional attributes will clutter up the system. I'm thinking of changing my set up to use Todoist Projects as my projects, so 'Build Fence' has all of it's actions as subprojects, organized in 1 list. My issue is that a 'Build Patio Fence' is in one Todoist Project, but the actions under the project, like 'Get Quote from Mike' in under a different Todoist Project. It was great to have that how to in one place, and they’re not that long (why do GTDers seem to write novels about their system setups).

It has benefits that I can create a filter to show Hikes in New Hampshire or Restaurants at Home. I bought a 10 setup guide from the GTD website about 3 years ago, and that has been my system since then (with numerous tweaks along the way, of course). I use 'Labels' for additional attributes such as a location, (Home, Condo) time of year (Spring, Fall) or special interest (Fitness, Hike, Restaurant). One thing I've done with Todoist, that I'm thinking of redoing is using Todoist 'Projects' as my context lists etc.

Gtd todoist setup guide