Where do I need most improvement rendering? (Patreon)

Just wondering what you guys think I should focus on, if anyone has an opinion, in order to continue to improve the renders. I think I have gotten quite a bit better, but I want to always be working on improving.  Where do you think they are weakest I mean in relation to the really good ones, I try to focus on everything, but want to put in some extra time where I need it most.