Default Permissions by User
It would be extremely useful to be able to set a default Permissions setting, by user, for all contacts, notes, activities, etc. What that default setting is can vary by user but could be assigned by either the user themselves, or the database owner. This would be a much better option (but not a requirement for those who don't want it) for keeping the clients and private information of different advisors and/or teams separate from each other while still allowing leadership access to a single database with all info.
For example: User: John Smith could be set to have a default permission of: Team - John Smith Team (Austin Office).
All items created by that user would then be permissioned for his team, unless otherwise directed, eliminating many potential future point of failure and forcing the user to opt-in to sharing more broadly (which should occur MUCH less frequently). For users who have a single team or office, they can leave the default as "everyone".