GR - do you have authors that have especially influenced your writing? Do you have kind of "role models"?
Hrm... that's a tough question. I know I have books that I really enjoy and have taken a lot from, in terms of learning how to write.
Arthur C Clarke - A Fall of Moondust; how to create tension in a confined environment with a restricted cast. (They never leave the moon-ship (always thought of it a bit like a private jet that skimmed the moon surface). And I've read a lot of his other books to.
Michael Kring - Space Mavericks; who the hell is that? Yeah, I know, most folks haven't heard of him apart from on the lists of worst books ever written

So, part of it may be what not to do, however in Space Mavericks you have a book of imagination (though the main hero is a bit like Wolverine) and great pacing.
R A Salvatore - Drizzit; not the whole series, but the struggle Drizzit has in overcoming his heritage.
L E Modesitt Jr - Recluse; what a great saga. The mix of technology and magic, the conflict between order and chaos, and the grey between.
Louise Cooper - Time Master trilogy; Still on my shelf (in the loft) and I have fond memories of the tight PoVs used.
Elizabeth H Boyer - World of Alfar; That real immersion into a different culture. Books that didn't feel like Medieval England.
Lyndon Hardy - Master of the Five Magics; Having more than one magic system co-existing and all making sense.
Raymond Fiest - Magician; Pug (of the original series) is still one of my favourite characters.
Hugh Cook - Wizards and Warrors etc; Still can't believe more haven't read this series. Totally alien fantasy world, full of great characters.
Lee Childs - Reacher; Almost a blank canvas of a character, yet with enough depth to be interesting and imprint yourself upon.
Clive Cussler - Dirk Pitt; Adventure, historical links, improbable plots and just fun!
Terry Pratchett - All of them; So clever, and such a master of the sentence. His commas meant more than other writers paragraphs!
And so many more... so many...