I went with Nextcloud Notes, because I don't want anything saving files locally that I then have to worry about syncing. I can just point a browser at it from wherever I am, or use an app. Also, it's nice that Nextcloud Notes saves them as markdown, so I can easily migrate the data elsewhere if I ever want to. And those markdown files are treated like normal Nextcloud files, so if you do want to sync that stuff, your notes sync along with everything else.