For my work Obsidian vault, I’ve been using the Primary theme. I sometimes miss the features of a more mature theme like Minimal, but the character of Primary makes it a pleasure to use.
A combination of Bauhaus, Scandinavian and yellowing magazine pages as palette inspiration—Primary is a theme for people looking for a certain nostalgic warmness.
It's perfect for adding some interest to otherwise dry subjects on which to take notes. Obsidian with this theme looks like nothing else on my Mac and that differentiation helps when I’ve got a few apps open. The visual elements let me know it’s time to work.