Determining the Tree Quality

What determines tree quality? If your trees have enough sound roots to support healthy growth, a trunk free of mechanical wounds and wounds from incorrect pruning, and a strong form with well-spaced, firmly attached branches, then your trees is high quality one. If your trees have a crushed or circling roots in a small root ball or small container, a trunk with wounds from mechanical impacts or incorrect pruning, and a weak form in which multiple stems squeeze against each other or branches squeeze against the trunk, then your trees is low quality one.