Regarding introverts - yes, that's me too. Even though I play in a band, and sometimes do solo gigs, as soon as I'm off-stage I'm happiest sitting quietly in the corner. At work, the "reds" and "yellows" are the ones that get all the acclaim and their names in lights, and us "blues" and "greens" quietly do the work. Management would have us all standing up and shouting about how great we are. But then the balance would be very precarious.