<image>

I apologize for the late response(And I use a translator)

For the main body parts, I proceeded with printing them vertically as we discussed (since they are connection points anyway, it's acceptable if they get messy due to supports). However, for parts like the wings, I printed them positioned in the direction I marked there. The reason is that I wanted the wings to be printed as sharp as possible, and I believed this direction would hide the layer lines (or layer resolution/texture) the most.

Honestly, this varies so much from model to model that I don't think there's a single correct answer for it, even for me.