Which repetitive 3D-printing task should we automate next?

I'm building Codex.ski, a set of browser-based generators for print-ready STL and 3MF files. It currently covers cookie cutters with matching embossers, lithophanes, Cherry MX keycaps, perler-bead patterns with printable alignment jigs, lamp shades, and more.

Our rule is simple: the result should be useful enough to print, not just preview.

For makers and small print shops, which repetitive modelling task costs you the most time?

1. Personalized text and nameplates

2. Dimension-based boxes and organizers

3. Threaded adapters and caps

4. Something else

Please share the workflow, preferred export format, and any test-print constraints that matter. I'll use the answers to prioritize the next generator.