"Beauty is only skin deep"
Meaning : A person's character is more important than their appearance.
So in my view, mere pleasant looking people are the most deceptive. Some people have good looks and acting like angels but actually their are looking to take advantages from other people. I've known some of these kind of people where we put so much trust in them but indeed had been taken advantages by them. Values, principles and humane nature is a more reliable trait.