I've been around for awhile and have seen how the site has changed for nearly a decade. That long view of where we have been and what problems we have had gives me some optimism about where the site can go. It also means that I have seen what successful (and unsuccessful) moderation and behavior looks like.
My participation in answering questions is mostly on fluid-dynamics and related topics. I spend a lot of my time lurking, waiting for those questions to arrive. I hope we can encourage more participation for questions about the physics underlying engineering work.