Are there any specific traits to look out for that are more desirable or that indicate a "higher quality" animal?

For example blushing, reduced patterns, bright/dark golden coloring, etc. are traits people like in ball pythons. Is there an equivalent list for rainbow boas?

In the end I'll definitely be purchasing the animal that is most appealing to me but I would like to be more aware of what to look out for.

Thanks,
Dennis