I spent half a year designing and creating 200+ icons for a custom geospatial mapping app. I really enjoyed the work but it was grueling and tedious, especially the design part. Too many people had too many different opinions on which symbols meant what, which styles clearly conveyed ideas without being too detailed, and many other things that kept wasting my time and causing a lot of rework and inconsistencies. It was literally just me doing the work, so I stopped trying to get consensus and took a few weeks to redesign the entire set and even used color science to inform my design decisions. I created the entire set without external input, then presented it. Sure there was some tweaking here and there, but I believe it turned about to be great and no one really complained in the end. The most important part was that end-users were happy. I used Inkscape and developed a set of scripts to automate the build and had everything in a very organized Git repo.