Robert McCrum has a long interview with Seamus Heaney in today's Observer magazine, called 'A Life in Rhyme':-
For someone who has been so remorselessly scrutinised, Heaney is still something of an enigma. He works hard to make "famous" seem normal. Unfailingly courteous and attentive, he can also be grave, remote and occasionally stern, always watching himself, like the king of a vulnerable monarchy.
In keeping with that vigilance, and a well-defended uncertainty, Heaney is always asking himself the essential questions articulated in Preoccupations, his collected essays. "How should a poet properly live and write? What is his relationship to be to his own voice, his own place, his literary heritage and his contemporary world?"