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To answer your question about best practices, well yes, there are. Like for your case, since you have multiple animations (and each animation could be different in size) so the best practice would be to select the Origin at (let's say) on the Head of the player and select 'For whole animation', and do that for each Animations.
Note: For that above, you have to select "For whole animation" and not the same "For all animations". That way, each change in animation would have the player's "Head" aligned (since that's a common/stable part of the character, unless you decide to behead him).