I really have to disagree with the bitey reptile comment, There are tonnes of species that do not bite out of aggression, they bite out of a mistake made by their owners usually in food response. Even with varanids, I havent noticed too many indivuduals that will turn their head to bite when being handled, most make good use of their claws and tails before resorting to their teeth.
Take Bearded Dragons, 1/100 will openly bite you, Frilleds little more nasty but I still havent been bit by one that tried to do it. Same with Green water d's, they just dont really TRY to bite you.
Don't get me wrong, I've recieved some nasty bites but I really can't say an animal went out of its way to bite me ya know? More or less just their food response getting the best of them.