If I could have any super power, it would be to know what people truly are thinking/know when someone is lying. I think people hide behind mask anymore and no one is ever honest about anything. Honesty is a joke to many people anymore instead of a moral/value.
Oo, this is such an interesting one! Personally, I think I would hate this, haha. To know when they are lying might be nice, but I do not need to know what people are thinking - what other people think about me (and just in general) is none of my business! I can see where this could provide a sense of security, though - at least you're not constantly have to second guess people.