Ehh I would quite say they have a mean tempered it's more like "I see it, I eat it". They honestly won't kill something without trying to eat it unlike say a great white where they do "test bites" to test if it's something they want to eat or not. Bull sharks will kill ppl to eat them while a great white tends to "usually" kill ppl by accident rather then pure raw predation like the bull shark is known for.