It should not matter the company you fly for or how you are treated. Professionalism is a personality trait. Professionalism is doing the right thing when nobody is watching. This isn't limited to your career either. If you try to throw something away and missed the trash can do you pick it up and try again or just leave it for somebody else? Do you say thank you when somebody holds the door for you? Just do the right thing not because people are watching but because it's the RIGHT THING to do. There are unprofessional people in every industry. It's just easier to notice the unprofessional airline pilots because of our public visibility.