Certain species will definitely have temperments what differ. "Agressive" behavior can be many different things such as strong feeding response, cage aggression, defensive behavior etc. If you want to understand the behavioral tendencies of a specific species, look at what they eat in the wild, what time they eat, how they hunt and what eats them and you will get tons of insight into what drives the behavior of your snake. With that said there are always exceptions to every rule.
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