Being a professional means that you are reliable, honest, well-groomed, confident, well-spoken, positive, committed and dependable.
It is not necessary to keep reminding a professional of what is to be done as they are always keeping their appointments.
Professionalism is displayed in all areas including speech. The language is chosen carefully, avoiding the use of slang and inappropriate language.
A true professional ensures that their physical appearance works for them instead of against them.
People enjoy working with co-workers who are always positive and energetic as negativity is extremely draining.
Professionals admit when they are wrong, they do not make excuses and they do not blame others.
Showing your emotions is one thing, however, professionals do not lose their composure and their tempers.
Being competent as a professional is a minimum standard, the rest is about behavior.