Oh! I only really thought of this as prevalent themes in current stories, but if it's meant to be themes in both our current story and anything else we've written, that that could oddly make things easier for me. So, if I think about BC and the Bloomers, I guess
1) Character evolution - and devolution. (Because let's face it, not everyone gets to be "their best self." More often than not, we go down a path that's not the best for us (and others), and it's surprisingly easy for that to happen.
2) Death and mortality, and what those mean to individual people.
3) Commitment issues, weirdly. But I guess it's one of my simself's trait's so it's not that weird, I suppose.
4) Causality and how does one decision in someone's life impact those of others, whether that be further generations down the line in my legacy or just affecting people around you and their lives in BC.
5) Flipping the coin... which really is a cheaty answer, because it just expands on my first point, and maybe the fourth too. But what I mean by that is that perspective is everything, so appearing one way is not an end all or be all, because it's all relative. We're all villains in someone's story, whether we like it or not. It's just a matter of viewpoint.