I know I have several books published so why do I still do NaNoWriMo when I can happily write a novel in a month and I have done that a few times this year already. But I think there are several reasons.
1. Community. The people on Nano are like super nice. I am part of a few forums but they are for 'serious' writers and they tend to be just a tad mean. Shooting down amateurs for the smallest of mistakes. I haven't come across one of the meanies on Nano. I have another post about all the meanies you can find on line so if you want more detail then check that out.
2. Momentum. Sometimes I'll have an idea and I'll sit on it and sit on it and sit on it. That was my last series. I kept saying I'll start it when I finish my other series and of course it sat there. I had a case of tennis elbow. If you don't know what that is, well it is when the tendons in your arm are pulled and torn by a repetitive motion. It is the precursor of RSI so something I want to avoid like the plague. So I went on a break. That was two months ago. I only really needed two weeks of rest. So I'm now at a standstill with writing so I'm going to use Nano to push me into writing again.
3. Fun. I can write a book in a month. I have even managed over 10K in one day but without deadlines and people to brag to it seems pointless until you have actually published and can wave the book around and then no one wants to know that you clocked 10K. But on Nano there are others rushing to win and you can post your word counts.
As you can see I can do without Nano but there are good reasons to still stick with it. Besides my mom usually also writes for nano and it is nice to talk together about writing. This year I am again using it to start a new series. This one is about humans who are model versions to populate a planet. They were supposed to prepare it for the real humans but it has been 200 years and so they have settled in to keep the planet for themselves.
And no I'm not affiliated with Nano in anyway except that I am a member. I kind of just borrowed this image. Click on the image to go to their website where you can access all the real stuff.