First of all, I love the new interaction tag c4d 16 has come up with.
After seeing the introduction of the tag we where like omg this is a bit to late but awesome.
So I went on with the facial rig but there was something wrong with the main bone, it was twisted so I was thinking should I fix this all or try the interaction tag.
The second it was fcuz and I was looking at the tutorial of Chris Schmidt(http://greyscalegorilla.com/blog/page/3/) and copied some of the expresso in my setup and it was kinda working.
A lot of trial and error with hooking up the posemorphs with expresso but eventually it worked out.
I modelled a bunch of poses and connected them and it works great.
You can assign a posemorph to a selection of the model.
And when you move your cursor it measures the distance traveled and maps that to a resulting percentage of the posemorph.
I used the sculpt tools to enhance and position my facial expressions.
Those work great.
I also love the fact that it is not destructive, you don't have to weight nothing, you can keep adding poses and alter as you see fit.
These are more of the model, I redid the painting of the face again.
My new workflow is this, I texture it in photoshop/bodypaint in standard c4d texture/shader mode.
Then I save the texture and it updates the texture that I use in my vray scene.
There are some minor things to be done but I am almost ready to start animating with this character.