I know to sculpt my characters with an A-Pose or T-Pose to save myself a lot of headaches later. As well as toes that point forward and straight fingers and a little bend on knees and elbows.
What I'm concerned about are the eyelids and lips. Since eyelids open and close, would I need more geometry around the eyes? How would I even do that? During retopology phase? Should I sculpt with the eyes closed? Same with lips, would it deform strange of the mouth is too small? How would I even know before hand?
Is there a general rule book for sculpting for animation? Pitfalls that people don't discover until they start animating?