Well I live in an area with little to no previous mapping and I'm practically the only person doing the area. It's good and bad at the same time! I can go for an extended survey and either literally put hamlets on the map, or go to towns with streets drawn in but no POIs. Or pore over satellite imagery and draw landuse in.. or paths... or lakes.... Neverending fun. I tell my friends it's like doing a geo-sudoku.

I try to fix the cycling routes in my city. As of now they're all mapped as if they were seperate cycling paths, even though most of them are roadside lanes seperated by flimsy plastic barriers.

Adding lots of missing bicycle paths, lanes, and designated routes in my area as well as all of the missing buildings. And fixing all kinds of little mistakes.