I recently discovered the Cupertino theme for @obsidian and it really is *chef's kiss*. I would especially recommend it to people new to Obsidian who don't really care about loading it up with all the power features and whatnot, as it is a low effort way to make Obsidian appear much nicer (IMO)
I try not to fiddle with settings too much because if I don't watch myself, I'll fiddle for days instead of actually using the app for what it was made for.
That being said, I couldn't help but install the Style Settings plugin and tweak some of Cupertino's settings. I also set up some custom CSS and typography. I'm using Helvetica Now Text with a few stylistic sets activated. And because I am a heavy click-and-drag-the-scrollbar user (for accessibility reasons), I've given the scrollbars my go-to big chonker treatment.
https://github.com/aaaaalexis/obsidian-cupertino
