Love HPL and wish Guillermo del Toro would get on with his planned adaptation of "At the Mountains of Madness". Used to be a big Moorcock fan in my teens, but lost my faith when he became a "proper" novelist. Wish I had kept some of my collection, though!
My favourite authors at the moment are George R. R. Martin (now huge, but his early stuff is well worth seeking out), Michael Marshall Smith (wish he'd go back to SF, though I have a suspicion that his "crime" novels may turn out to be SF), Graham Masterton (who should be a lot better-known) and Peter F Hamilton. There's more, but I need to eat as well as type during my break!