Think of it this way... A 5 is the absolute best anyone can be. Albert Einstein was a 5, Mother Theresa was a 5, Muhammad Ali was a 5... Are you really a 5? That leaves you 4 stars to work with; that's what all us mortals get. Are you the best of the mortals? A 4 is someone who's gone above and beyond for years. One of the best the industry has to offer. They make game changing decisions that save the company time and money. They're the thinkers and engineers who change the way the game's played. Is that you? If not, you're probably a 3 or less. A 3's a very good score, and shows that you go beyond the average, and do better than someone who "does his job" :^)