According to Forbes magazine Kefalonia ranks 4th in Europe amongst the Top European Places to Live. This is the whole list:

Top 10: European places to live

1. Gaiole, in Tuscany

2. Saint-Rémy-de-Provence, France

3. Copenhagen, Denmark

4. Kefalonia, Greece

5. Ljubljana, Slovenia

6. Burford, UK

7. Budapest, Hungary

8. Sibiu, Romania

9. Rome, Italy

10. Dejà, Spain

Source: http://www.independent.co.uk/news/uk/this-britain/perfect-places-to-live-tuscany-kefalonia-rome-and-burford-1669964.html