I am learning to model in Blender with emphasis on character design and animation.
I have both tried to implement models as a single mesh with Vertex groups and shapes keys as well as separate objects (parented). However, I still do not have a clear idea on which is a more correct method of attaching extra elements to a mesh, such as, eyebrows or eyes.
It seems like having them in the same mesh is easier to manage. Whereas having them as separate objects/meshes allow easier re-usability.