ABCNews -- On the one hand, there's the mystique of 50 Cent: the "gangsta" rap, the rap sheet, the being shot nine times, the songs about partying and pimping and pushing drugs. His concerts are punctuated with gunshot sound effects and boisterous stage banter. On the other hand, as we found out over two days in his world -- which includes the isolated, 50,000-square-foot Connecticut mansion where he lives alone -- there's the surprisingly subdued reality of 50 Cent. His home has 18 bedrooms and special features such as walls by Gucci. "That's when you get restless and you ain't got much to do," he said. "And, you say, I'm going to buy a Gucci wall." Watch the full story tonight on "Nightline" at 11:35 ET Despite the space, he doesn't have a big...