I love NaNoWriMo! It's a lot of fun and the community is really supportive... This is my fourth year participating and I have never finished, but I really look forward to it every year just as excuse to get myself writing! It's a personal challenge and I like that all you have to submit to win is a word count. Whether I make it 5k or 20k or 50k, that's thousands of words I may not have written if I hadn't forced myself to make the time. So no matter what it always feels like an accomplishment!