Where to put custom fields: Product type or product display content type?
I'm still getting my head wrapped around Drupal Commerce.
When I need to add custom fields (like taxonomy or tags describing a product), is it better to put the field in the product type (admin/commerce/products/types) or in the product display content type (admin/structure/types)?
I know the answer is going to be "it depends" so let me give you a few scenarios.
Suppose I have one product type ("Product") that covers a wide variety of widgets.
Now suppose I have several product types ("T-Shirts", "Robots" and "Telephones").
How does this change where the custom fields go?