OK so I got my male sumatran in August. When I bought him I knew he was really aggressive, but I got him anyway. They told us that he was hook trained, so after I let him settle in, for the first couple months I took him out with the hook. And he actually got MORE aggressive. I couldnt get near him when I had him out which caused even more problems. Surprisingly I never got bit even though I was struck at about 5 times a day. Finally one day I decided that if I was going to get bit I better stop bein a coward about it, so I took him out with just some leather gloves on, instead of even trying to mess with the hook. He did wonderfully! After a few minutes he relaxed and started exploring. So if I take him out withought the hook he does great, when its only just me around. Hes doesnt mind if I accidentally put my hand in front of his face but as soon as someoene else comes in the room he flips and tries to bite ME. But its usually a lazy warning bite. And the other thing is he gets really aggressive when I put him back into his cage after holding him. Its almost like hes aggressive about his territory, but I didnt think snakes did that. He just seems really unpredictable. Are most bloods like this or do I just have a crazy evil genius on my hands?