Peter Lynch, 61
When he retired from managing Fidelity's Magellan fund in 1990, people said he'd be back. In fact, he never left: Lynch still keeps an office at Fidelity's Boston headquarters, though his client list has shrunk to his family and foundation. He works only part-time. (He spent some 100 days traveling the world with his wife in the past five years.) "My method for picking stocks has never changed," Lynch says. "When businesses go from crappy to semicrappy, there's money to be made."