I am using a range of projects purely for myself, but others would be welcome to join, of course.
For rating the rarity of moths in Europe, there are a number of projects. They are using the rarity groups “less common”, “rare” and “very rare”, corresponding to the bottom 25%, 10% and 5% of all Observations on iNaturalist. Of course, I will need to update this every 2-3 years. Observations are added automatically by the system. Example https://www.inaturalist.org/projects/rare-noctuidae-europe-bottom-10
To identify my 1st record of a species, genus, tribe, subfamily, family and class, another set of projects. I need to manually attribute this to one of my observations. Example https://www.inaturalist.org/projects/my-1st-record-of-the-genus
To group together all observations found at elevation 2,000m or above, another set of projects should help, at the moment only for the political territory of Switzerland. The >2000m maps were extracted from an official Swiss topographical website (swisstopo.admin.ch; file name “DHM25 Höhenprofil”) and rearranged using QGIS and Google maps. Projects for several taxonomic groups were created: plants, birds, major insect groups. Example https://www.inaturalist.org/projects/papilionoidea-above-2000m-in-the-swiss-alps
For easy search of what geographical areas would be in need for help with ID, referring to invertebrates only, three projects combine geographical areas which I believe would benefit from more attention: North and Cetral Asia, Africa and remote islands. The specific areas were extracted by area/observer and area/identifier considerations. I will manually update these areas once every 1-2 years. Example https://www.inaturalist.org/projects/neglected-areas-north-central-asia-invertebrata
For comparison of 3 Winters, I used projects to collect observations from my back garden. Projects are automatically collecting from the Saarland (Germany), but confined to observations made between Oct 1st to March 31st only. Example https://www.inaturalist.org/projects/winter-insects-saarland-2023-24
For help with both searching and identification, I made a group “Microlepidoptera” which combines the numerous families of Lepidoptera considered micro lepidoptera, world wide. This helps, because “micro lepidoptera” is not a valid taxon, but rather a practical term introduced by butterfly collectors two centuries ago. See https://www.inaturalist.org/projects/microlepidoptera Similar projects for “wainscots” and “small black day flying high Alpine moths”, but these only for use in Europe. Another one for “Erebidae, fat & small” for use in Latin America only.
I hope, this selection of projects can inspire the one or the other. Please PM me if you wanted to join or ask questions.