Mine definitely chilled out as they grew. I have 4 adults and none of them are biters. One is a huffer and a puffer, another is a squirmer who always tries to flee the scene and the other 2 are pretty relaxed. I have little doubt if I handled with any regularity they'd all be pretty darn calm but I like to see a bit of attitude so I only handle for transfers to clean. Out of my 8 hatchlings 2 think they are the baddest things on the planet and will bite, bite, bite, and bite some more to keep it fresh in your mind. Luckily they are the nicest 2 and my holdbacks so I get to enjoy their shenanigans as they grow. The other 6 are already pretty calm for hatchlings, might get a nip from 1 or 2 but they quickly turn to putty once out for a minute.