Exclusively set the Home Screen and all visible notes to match a personality. Could be stack based, but it would be better not to be so some notebooks could live in both worlds.
The easiest example is work, though I would want to set a personality up for home, any charity I am currently working with, and might at times want to limit scope to a particular project to prevent distraction. Here's a few work examples:
Especially when someone else can see my screen, I do not want personal notes showing on the Home Screen, in search results, or otherwise (for example I may have taken notes in my last doctor appointment).
I do not want to see my personal tasks when all they can do is distract, clutter and cause me to feel guilty for something that I can't address while working.
I don't want to accidentally link a personal meeting with a work note
I would like to reduce the number of notes that end up in the wrong notebook
My calendars, desktop, tasks, visible stacks and notebooks would all be attached to a personality. If not in a designated personality, they would be available at all times.