I didn't care for Natalie in the beginning. Not much to look at, very little personality, and not a strong player.
As time has gone on, however, she's become one of my favorites. If her facial exressions are any indication, she is VERY engaged in the game. Plus, she gives 110% at challenges. Natalie may be under the radar, but she is not playing under the radar.
And, while she was just bleh for me at the beginning, her growning sense of accomplishment shines. IMO, she is a classic example of how important inner beauty is to overall beauty.
Listening to Jaison talk about how proud he is of her a few episodes back makes me think he has a crush on her. They'd be a very, very cute couple, I think.