I'd have to say I wouldn't want to read peoples minds because I'd be tempted to do it all the time and from what I've come to learn about peoples thoughts after once dating a girl with an obsessive compulsion to tell me everything she's thinking, is that people think bad things and it would only be upsetting knowing what everyone is really thinking at any time.
I would love the super power the guy in the film 'Jumper' has, where he can teleport anywhere any time in an instant. You'd be pretty much invincible if you could do that. You could leave any dangerous situation in a flash or even visit Paris for 5 mins and then hop off to Barbados when you feel like chilling on the white sands.