For me, Mastodon has the energy of a really earnest, fun Uni society, probs doing some eco shit or other actually important work. Everyone is more intelligent than me, is a sysadmin or famous writer.
Whereas, #Tumblr is just that gif of the chimp pissing into his own mouth and absolutely loving it. Gargle-giggling.
This is why I need to be on both these august portals of humanitude. Their energies balance each other.