Sad to say, I did not start out reading Science Fiction. In my teen years, I can only remember an Arthur C. Clark short story (published in Playboy, for heaven sake) and Jules Verne's Twenty Thousand Leagues Under the Sea. Through the years I read some but not regularly until relatively recently. Can't say what exactly triggered the big urge to read Science Fiction, but Greg Bear, S.H. Viehl, the Halo books, and my all time favorites, Jack Campbell and Jack McDevitt, started appearing on my bookshelf. When I got my Kindle, and subsequently discovered Project Gutenberg, well, the dam broke. I have about 140 Scifi books/short stories on my kindle that are waiting to be read. In the meantime, I am also borrowing from my library, the Kindle Lending Library, and soon, the Free Library of Philadelphia.
This does not mean to say that I have totally neglected other genres. I am back to reading Donna Leon, continuing my Roman histories, and next up on my library wishlist is either Murder at the Gardner or a nonfiction about Teddy Roosevelt and what the creation of the National Park system, called The Big Burn...
BTW, there don't seem to be any Fred Hoyle books formatted for Kindle. Hmmmmm.