Alan Moore is unquestionably one of the great comic book writers of all-time. He wrote a very famous three year run on Swamp Thing, various Superman and Batman stories, and graphic novels such as A League of Extraordinary Gentlemen, From Hell, and V for Vendetta. However, his crowning achievement is most definitely Watchmen, which is still considered one of the greatest graphic novels of all-time, and was the only graphic novel to appear on Time‘s 100 Greatest Novels list.
Besides this obvious greatness as a comic book writer, he also is a very eccentric person. He had a mutual female lover with his wife for a number of years, he has dedicated himself to becoming a ceremonial magician, and considers himself an anarchist. He also has had a long history of battling for his comics to not become films, and actually has given up millions of dollars to not have his name on those films based on his works.
I think one of the fascinating things about Alan Moore is actually how he writes his comic scripts. I found a sample of his script for The Killing Joke (Word File), and here is the beginning of Page 1, Panel 1:
WELL, I’VE CHECKED THE LANDING GEAR, FASTENED MY SEATBELT, SWALLOWED MY CIGAR IN A SINGLE GULP AND GROUND MY SCOTCH AND SODA OUT IN THE ASTRAY PROVIDED, SO I SUPPOSE WE’RE ALL SET FOR TAKE OFF. BEFORE WE GO SCREECHING OFF INTO THOSE ANGRY CREATIVE SKIES FROM WHICH WE MAY BOTH WELL RETURN AS BLACKENED CINDERS, I SUPPOSE A FEW PRELIMINARY NOTES ARE IN ORDER, SO SIT BACK WHILE I RUN THROUGH THEM WITH ACCOMPANYING HAND MOVEMENTS FROM OUR CHARMING STEWARDESS IN THE CENTRE AISLE.
That is him speaking to the artist, not anything actually connected to the panel itself. His script is almost a work of art in and of itself, besides the final product it becomes.