Retopology for animation
 

Hello guys, I'm new in retopology and I'm trying to retopologize this character (see attached) to animate it in Maya. So far I realized the crotch and the butt are really bad retopologized because of the deformations I got in the rigging.
What about the face? mouth edges, eye lids, cheeks. Do you think the polygons are following a nice path? what a about the vertex where 5 edges converge? are they well located to have smooth transformations?
What else could I improve?, I would appreciate if you can give me some feedback using grease pencil or any tool you use to make annotations on the mesh. Any tip, trick or online guide is highly appreciated too.
Thanks in advance!!