It’s obvious that you should avoid stupid lazy people. Also, you should stay clear of dumb hard-working people (you spend your life fixing their mistakes, and they make lots of mistakes because they’re always working).
The most dangerous category are staff that are smart and hard-working. They create work for everyone in your company!
The best people are smart and lazy. These are the folks that will find better and faster ways to do things. They will bring efficiencies and shortcuts. Why?
Because they refuse to spend 70 hours a week doing a job that can be short-cutted, and they have the brains to find out how to find the shortcut.
If you want to scale without hiring people, bring in smart lazy people.
PS: This is a Jack Ma (Alibaba) rule