Yes, constantly. My main town is a forest town so I don't want my second one to be a forest as well, but then I had the idea for an Over the Garden Wall themed town and I REALLY wanted to make it into an autumnal forest to follow the theme :c
I decided against it though, so now I guess I'm going for a colorful, fairytale sort of vibe. Always finding different ideas that I want to try though... I can't pick just one so for now Petaluma is mostly themeless haha