.....As others have said, I have many 'favorite' authors, depending on what mood I'm in.
When I'm in a Science Fiction Mood, I like Robert Anson Heinlein, Andre Norton, Spider Robinson, Larry Niven, Leo Frankowski, & George Lucas (he counts!);
When I'm in a Fantasy Mood, I like Lawrence Wyatt-Evans, Sean McMullen, (and a bunch of others I can't seem to remember right now);
When I'm in a realistic mood, I love Robert Tannenbaum. I did like Sandra Brown for a while, but her pattern of characters and romance-soft porn got old fast.
.....It would be fun to see someone take Tannenbaum's evolving family-of-characters out of their 'New York Legal System'-environment and successfully translate them into a Fantasy or Science Fiction environment, without being too obvious.
..........Which of your most favorite authors works would you like to see translated into a different genre?