I share a Kindle account with 2 friends. We have overlapping interests and individual interests. I hate seeing their choices in my cloud
I had considered getting one for my Mom or my niece but I really don't think either of them need to see some of the 'edgy'

choices occassionally selected
I never used the wishlist feature and they have their own accounts for shoppingl Just use my account for books (I read the most in the group)