It's a subject I've been touching more on recently too, I use auto votes to ensure I use 'some' of my voting power daily, as some days I don't get around to manual curation. It's always great to stumble into a great post and be able to curate it, so keeping balance is key, especially for a sloth!
For my community we have a manual curation account who's sole job is to curate there, and keep things as fair as can be, hopefully, we can continue to onboard more users so the curations will become even more spread and balanced.