Stopping time or Going back in Time?

 Both ideas of stopping time or going back in time sounds spectacular! But I'd rather go with stopping time. 

Why? Because I could do many things as people freeze - like take another persons' unfinished sandwich, or probably go through my sisters' closet and take some of her clothes without her noticing. 

But going back in the future? For me personally, it just seems like you're saving yourself from embarrassment and from you're worst moments. 

You might even mess with the future by messing with the past.