Notion's primitives (pages, sub-pages, templates, and databases) hit the sweet spot of being customizable while also being usable. There are still some things I would like to change about the UX (shortcuts for all the things!), but overall I'm a very happy customer.
Anyway, just wanted to throw out some support for a product I've been happy with lately. Try it out![1]
[1]: https://www.notion.so/