I would rather be a giant rather than a shrunken person. This is because most of the giant people are the ones who help the world to overcome most of the challenges they are facing. They often save the world from disasters and make the world a better place.
Exactly how giant? If you're talking like Godzilla sized, then giant because I could take over everything >:D Being shrunken might be more practical, though lol. I wonder how much I'd have to eat and drink as a giant o_o