I’ve been a long time user of Taskpaper and just recently upgraded to TP3 from TP2 (thanks Sierra).
I just moved over my HelvetiCan theme from TP2 to TP3 as well as polishing it up a bit. It’s clean, simple, readable/scannable, and focused on making sure I can GTD my workflow and inbound and delegated tasks weekly.
You can grab it off Github here: https://github.com/wakatara/HelvetiCan-Taskpaper-theme
Feedback appreciated and, of course, if you have ideas for improvement or note anything I might have missed, please feel free to raise an Issue or ping me for a PR.