Having the ability to add personal tags is a great feature. However, it would be even better if you could classify your tags as Cuisine, Course, etc.
I like to browse through recipes using the Cuisine or Course categories. I have a problem sometimes since I can't properly classify some recipes given the predefined lists. An example would be Beverages. I have several recipes for drinks (alcoholic and non-alcoholic) that I'd love to show as a "Course" to browse through. I wouldn't call them "Appetizers" or "Dessert" or "Main Course". They might be "Aperitif" or "After Dinner", or simply "Beverages".
I know I can use the Keyword Browse, but this is not quite the same thing as being able to put recipes in the proper category.