Today I've spent most of the day doing faces for Pablo and to do test animations. There's a lot of details in the rig design you come to think of when starting to animate. For example, I like when positioning of hands and elbow direction isn't affected by, for example, the belly's direction - I like them to be "global". Same goes for knee direction. I'm glad I spent the day doing that - rather now than later.
I've also constructed a MarkingSet for Pablo's animatable parameters and I scripted some tools to easier key the characters.