See, what happens is sharks will sense movement and will get curious so they decide to investigate. Once they can see what they sensed they go and nip or bite at it to see what it is, thinking that it is most likely a seal, they attack it. In which then they find out what it is and are drawn in more to the creature by the blood from the attack(which they like). So shark attacks are not normally intended for humans but for seals (their normal diet).

Between being a horrifying man-killer or a curious creature I would put a Great White Shark as neither, just as another dangerous animal in the sea-  that happens to be huge.