WOW!! What an amazing time of life... I remember it well. (Mine are teens now.)
ANd I want to say something that won't seem relevant for a couple of years now.
Our children will absolutely believe (and come to take pride in) the things they hear us say about them.
As your daughter grows, if she hears you say she is "smart" she'll believe it. If she hears you say "Stubborn," she'll believe that, too.
Of course, in our new-mom sleep deprived states, a one month old can SEEM stubborn--although they aren't developmentally actually stubborn! LOL But most likely you were just expressing yourself.
The important thing is to be careful (starting now) about the traits you speak about your child-- they WILL perceive themselves that way, and so they will behave that way!!!
Crazy sounding advice, I know, but TRUST ME, it's TRUE!!!
Good luck!