As far as branches go, young branches point up, old branches point down. You want your bonsai to look like an adult tree in miniature, so the primary branches always hang down as if weighted by age, environment and size. Young branches up at the top of the tree can sometimes point up, depending on type of tree.
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This is my Fibonacci sequence tree. I am posting it to show branches hanging down, and because it will drive Al nuts![]()
BNut, what you are suggesting is true. Except for the cases when it is not. Branches hanging down like on your Fibonacci tree are OK for pines, spruces - conifers generally. There are conifers growing differently in different conditions depending on amount of harsh conditions to which tree in nature is exposed.

On deciduous trees in nature main branches/sub-trunks almost every time grow up. Even on very old trees - like on this old oak. And deciduous trees does not have apical dominance so they often does not have single apex.
But I understand if somebody wants to have maple bonsai shaped like pine.
