Resurrecting this thread, as I was searching for info about Liberty(NW grown nobel variety) hops and flavor/aroma clashes. My little brewing crew and I wound up with a few pounds of Liberty last harvest, along with cascade and centennial from a local hop farm here in the Portland OR area. We brewed at least 10 different beers with Liberty and found that they do not blend well as a flavor addition (10-30 min) with citrusy "C" hops. So, as mentioned above, noble varieties may not blend well with our standard American varieties. All the beers with Liberty and either Cascade or Centennial had a very odd flavor, while not terrible-very distracting. Liberty did well in single hopped lagers. So, Liberty does not play well with others, at least from our experience.