To celebrate Valentine's Day, we've asked writers to share their perfect love poems with us. Read choices by AS Byatt, Seamus Heaney, Margaret Drabble and many more – and tell us which poetry gets your pulse racing …What makes a perfect love poem? Obviously, the possibilities are as endlessly personal and subjective as love itself. This week, we've asked writers to choose their favourite love poems – collected together here in our beautiful interactive – for Valentine's Day.For John Burnside, winner of this year's TS Eliot prize for poetry, the most eloquent are those that voice unspoken adoration, hence his choice of Walter Raleigh's The Silent Lover; whereas David Nicholls, author of one of the best-selling love stories of recent ...