The place is wonderful, the small villages are absolutely stunning, and you can find nice beaches with easy access ( even though these are crowded in the afternoon). Obviously best places are far from bus stations, so if you like trekking, Amorgos is for you. The monastery of Chossoviotissa is impressive, especially if you arrive from north by foot. Best beach: Ammoudi - Chalara; Best village: Eghiali - Tholaria; Best Activity : trekking and swimming; Best Bar/Pub/Club: everything on the beach or through the small streets of Chora. Food is really very good; possibly you would expect to eat more fish but they have a wide variety of meat (stuffed, fried, grilled) and local vegetables. Prices are affordable, considering I'm used to Italian restaurants, and portions are big. Chora is a little more expensive.
Come to Amorgos only if you are not looking for a "typical" five star vacation: here women dress in black with white foulards, men ride donkeys, and 80% of the streets are not good for cars. This island is suspended in the previous century and life goes with sun and pastoral activities. But if you are ready to walk free through Mediterranean vegetation and funny goats for hours, you'll reach the bluest of seas and the whitest little chapels nearby.
I hope it will remain for years and years as beautiful and wild as it is now.