Why? It means freedom. It means stretching the writing muscle, writing for the sheer joy of it. Writing without thought to publication. It is the one time of year I can truly turn the internal editor off and write what ever comes into my mind. I write for me.
The first of November begins a month of just writing...bliss. It is even more appealing now that I've been published. The weight of expectation is upon me, but not for NaNo. No one has to see what is written - ever. If on day one I want to write a sci fi gothic tale of medieval chivalry...then I can and if on the second it becomes a dark urban fantasy that's good...on third it may move from first person present tense and on fourth to omniscient narrator...
The joy is... it doesn't matter...it's time to experiment and push the boundaries. Each day is nothing more than a creative writing assignment and it is so good for the writing soul. Two years ago I wasn't going to do NaNo but I woke on the first of November and began only with a title and not a clue of where I was going....bliss. The Summer of Black Hare was created and I wrote a long piece of fiction for the first time in first person...before I had been to afraid, to afraid of failure, but with Nano the only failure is not writing and that is a gift.
NaNo gives you permission to write what ever comes into your head...even if that is I want chocolate now....it's permission to experiment, it's permission to be total crap, to try all the techniques you have read about but were afraid to ruin the work in progress. NaNo means give it a go...
What NaNo doesn't mean is that you have a perfect work ready for the world - you won't. At best you will have a very dirty draft and worst you will have 50,000 words of drivel....but you will have used your writing muscle in a different way and have grown as a writer because of it. You will be stronger when you write your next proper book....
Are you doing NaNo this year? Even though I am doing edits on A Cornish Affair I'm hoping to wake on 1/11/12 and begin something fun but I just don't know what yet!