I have done many models in NURBS and Poly. My personal preference is Poly. But, I think NURBS is a great way to start modeling as it forces you to plan your edge loops very well.
Many times, I start with a NURBS model and convert it to a poly model.
If you ever want a good reference to model, I highly recommend following all video tutorials posted by squirc on youtube.
Just look for this username and you will see a bunch of tutorials.
Click here to see some of the blendshape modeling techniques/workflow
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