I believe temperament is heritable (all experiments certainly support that), and only hold back docile animals. An aggressive/overly defensive snake is a deal-breaker for me.
My cinnie het albino girl is fine, nothing unusual about her temperament. My cinnie breeder male is also docile.
Out of hatchlings, I have found it follows clutch lines more than morph lines. Some pairings produce more aggressive hatchlings than others. Most of the babies will calm down with age, either way.
I believe if cinnamons or black pastels tend to be more aggressive, it's because people have been breeding aggressive ones.
I've yet to encounter a morph in which the general tendency is for increased aggression, it's always down to bloodlines, not morph genes.
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