I don't know if this topic has been discussed, but i have something to share.
It looks like attributes are random within those boundaries with uniform distribution, am I right? Right now I can see a lot of grunts with extreme attribute values close to either 30 or 70.
In my opinion it would look better and feel more natural if those values would correspond to Gaussian distribution with mean equal to 50 and standard deviation equal to 10 or 6,6(6) (95% or 99,7% of drawn numbers would be between 30 and 70).