One of the most popular battles for armchair divers and Internet warriors is that of training versus experience. You hear it all the time: “I don't need a certification card for that dive. I've been doing dives like that for years.”
Ego simply refers to self and how we feel about ourselves. This results in our thoughts, emotions and behaviour. Where an ego is arrogant, overbearing, misguided or delusional, then bad things can and often do happen.
Over the years, I have had the privilege of being involved in some fantastic teams, sometimes in a leadership role, sometimes as an advisor helping to form a great team, and in others, as a team member.