Do you want field type suggestions in core, I know I do...
Posted by Jeff Burnz on April 29, 2010 at 12:20pm
I posted a feature request: Field Type Template Suggestions to allow us to have #field_type template suggestion and preprocess functions in core.
At the moment you cannot override something like all taxonomy reference fields or all image fields, you are limited to field_name, bundle and field_name__bundle which are all groovy but not the raw down-low grunt needed when you want to simply override all fields of a particular type.
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