Actually there is nothing to feel like criminal about, a recent study has concluded that one third of the americans are introverts. Introversion is a natural personality trait not a flaw to feel shameful about or even to resist. The ideal personality was considered to be introversion untill one century ago, before the extroversion ideal started to prevail with the rise of sales and marketing careers. As you said it takes all the colors to make a rainbow. Most of scientific, political, technological breakthroughs have been introduced by introverts.