I love Goblins as well so I always make mine Pathfinder inspired so they will be green with a big head who love fire and general chaos instead of orange like dnd goblins. They are always fun since they like to straddle the lines between disgusting, cute, destructive and helpless. I know my players always will befriend them so I like to put a lot of them in there.
I also like to treat them like cockroaches or fruit flies who breed very fast and can adopt to any conditions. So there will be strange variations based on where they live. Mud goblins, fire goblins, moss goblins who just have small physical adaptations to better fit their habitat.
If you have a few trees you can just mow over the leaves right on the lawn which breaks them up enough for your fall fertilizer if you don’t have a use for them. The last few years I’ve been using mine to compost in place my gardens. Haven’t had to bag since