One Duffy poem that haunted me was "Salome" which begins (from memory, so probably with error), "She's done it before and she'll do it again." It is a remarkable poem in word play and general playfulness around a solemn subject.
In her interview with Charlotte Higgens in the Guardian she expressed joy at being able to represent women who have revolutionized poetry over the last forty years.
Links:
Rachel Cooke, "'I still haven't written the best I can,'" Observer (May 3, 2009).
Charlotte Higgens, "Carol Ann Duffy: 'A celebration of great women poets' Guardian (May 1, 2009).
Sarah Lyall, "After 341 Years, British Poet Laureate is a Woman," New York Times (May 1, 2009).