I've flown with ATPL's and PPL's, individuals in both have exhibited traits where I would be happy to fly with them any time, and others no way in the world if I could help it. For a commercial pilot the standard is set by the employer, it may be good, or it may be the absolute pits. There are no guarantees with what you're getting, other than by due diligence checking of who you wish to employ. Buyer beware.