Last year, I took part in the Guardian’s competition ‘10 great Greek islands: readers’ travel tips’. I was so excited when I saw my tip ‘Hiking in Amorgos, Cyclades’ published that I did not realize that it’d been the winning tip. A few months later, I decided to spend the prize, a £200 hotel voucher, on a weekend break in Vienna. The Austrian capital has recently been named the best city in the world to live in – for the tenth year running. According to the annual Mercer Quality of Living survey, Vienna topped the list of 231 cities around the world. The ranking was based on a number of…