If anyone says that personality doesn't begin at (or even before) birth, then I will have to definitely argue that it certainly does! My Lila has always been a sassy girl, even as a tiny little baby. She could smirk before she could smile, and she has the most expressive eyes! Here are a few pictures that illustrate my point:
almost 3 months old
six months old:
seven months old...and even today (at 2 years old), she is sassier than ever!