J.K. Rowling - how she came up with such stories still amazes me.
Judith Mcnaught - it's her book (something wonderful) that got me hooked with romance novels. And since then, I never stop reading. She'll always be my fave romance author. i've read all her books and about to complete my copies of her books.
Jude Deveraux, Nora Roberts, Julie Garwood - i love these authors too.