I give self confident people a wide berth, and prefer to work/be with the humble and contrite of heart. But if we are talking about being collaborative and decisive, yep...I'm OK being with them.
"clothe yourselves with humility toward one another, for God is opposed to the proud, but gives grace to the humble. Therefore humble yourselves under the mighty hand of God, that He may exalt you at the proper time, casting all your anxiety on Him, because He cares for you. Be of sober spirit, be on the alert."