It makes me laugh when people have their self-congratulatory circle jerks:
A: That's a great idea; it will be a great novel.
B: Thanks! Yours will be too :)
The ideas are probably amazing - there are many great ideas (none of them mine, of course, oh, who am I kidding?! I'm fab too) - but the ensuing novels will not be, that's the whole point of NaNo.
That's why there's the popular saying over at NaNo: "It's not about getting it right, it's about writing." Or something.
Okay, that's me done.