I personally limit myself on some organisms that are common for me. I could submit records of Greater Roadrunner almost every day – and, like many, I never get tired of seeing or photo’ing these birds – but they are well-represented from my area. So I’ve posted few records of them.
Live small rodents, shrews, and bats are probably under-represented on iNat. They are just really hard to photograph in a way they can be identified, even when captured, as are many mammals.