Otis Williams is the sole constant in the life of one of the most successful groups in Motown history. He formed The Temptations in 1961, and the record sales tell a story of extraordinary success.If rock and roll was about sex and drugs, Motown was all that and more. So how has he sidestepped the cocaine addiction, the drink and the depression that killed other members of his group? Did he ever feel he got his just rewards for so much success? And when will he finally decide he has had enough?(Image: Otis Williams. Credit: Hulton Archive/Getty Images)