Which GM author do you consider to be the most informative? Which one helped you the most with your chess development, and what did you like about them? Was it their writing style, insight, humor, analysis? 

My personal favorites include Yasser Seirawan and vladimir Vukovic. Vladimir might not be as funny as yasser, but he had superb understanding of the attack and how to conduct it. His book has been helping me a lot.

So, who's your favorite author and why?

SEIRAWAN!!! I LOVE HIS STYLE AND HIS ENTHUSIASM FOR THE GAME!

Tartakover is memorably witty.

Bhat.

Really.  I love his articles.  And I don't have to pay for them  (yeeha!)

SEIRAWAN!!!

If you haven't already check out the chess books by John Nunn, they are all fantastic!

Anything by John Watson, but especially his Series on the Openings (3 vol published and #4 pending) 

OK, he's not a GM, (he's an IM) but he outwrites nearly all of them

Yeah, John Nunn, my alltime favorite really has writen really good chess books !

My favorite's Kasparov. Also liked a lot John Emms in his Survival Guide to Rook Endings. And another fun one was Speelman's Best Chess Games 1970-80 (I think it was called).

Bruce Pandolfini

I like to go over the games in chess life, he does not overanalize.

Bronstein.

I like Neil McDonald, he's very clear and concise.  also CHernev, although he's a bit too stuck to the rules.  But funny in his old way.

My favourite will always be Tartakower. great annotations, sense of humour and sense of drame "Duelling with rapiers on the edge of a precipice"

Larry Evans of course. Never seen him print a Chess mistake yet. Bronstein was very good to read too, for a games collection.

Mikhail Tal and Eduard Gufeld are the 2 main writers who got me seriously hooked on chess.

They opened my eyes to a whole new way of looking at the game with their accent on tactics, attacking chess and the aesthetic appeal of the game.

mine is horsley Vaughn stag, he played the four knights opening while slurping on a frosty from wendy's.