Also off the top of my head:

"Thou shalt at least attempt to align with the genre and tone of the upcoming game whilst developing thine concept."

#CharacterBuildCommandments

I was recently reminded of this one of my #TTRPG #CharacterBuildCommandments :
"The sight of thy character sheet must not cause the GM's head to hurt, nor shalt thou build in such a manner that thy turns take three times that of thy neighbors."

What commandments do my fellow #GameMasters have to add to the list?

#CharacterCreation #PlayerAdvice