Everyone just gets good skin. By default.
2. Normal bodily functions... what normal bodily functions?
"Romantic" scenes that follow day long montages of sweat-inducing activities always irks me. And no one ever has the misfortune of having their "time of the month" at inconvenient moments (I'm looking at you spontaneous-skinny-dipping scene).
3. Natural conversation.
Unless you're watching one of Apatow's offerings, chances are the conversation will flow effortlessly, especially in a meet cute. Or at least be the cute brand of awkward. You know, when the guy's jokes are charmingly inappropriate and the girl's laugh a tinkling aural delight. In my personal experience, I tend to be at my worst when I fancy someone. An adorable little romcom heroine, I am not.
Characters so cute that I had to write this post to explain to my jealous self how my life isn't a movie