Princess Cruises have done much to have the risk of cross-infection / cross contamination under control in all areas of the cruise ship. My wife and I were very impressed with that. We both have some knowledge of pathogenic bacterial control.
In addition the air quality around the entire ship is fresh, nice and comfortable.
Also, the Golden Princess has neat and modern interior decor, really happy with it. Very attractive buffet area (Horizon) with smart, modern lighting - we didn't need to go elsewhere.