Perissa, Santorini
There are plenty of taverna's along the beach where you can sunbathe using their luxury sunbeds for the day (not very expensive) or if eating and drinking there most of them are free.
Santorini is a beautiful island and I would definitely hire a car next time to explore further. We took a lovely sunset cruise and had great views of the Caldera. The capital Thira is worth a visit and few things we missed this time give us an excuse to go back. I would love to explore the volcano and swim in the hot springs, visit the Santo winery and visit Oia for its beautiful sunsets.
The restaurants and bars are all great, especially the Hellas Restaurant in Perissa, with lovely home cooked food and a great friendly service (it made me realise how hospitable the Greek people are). I was expecting Santorini to be expensive but you could get a lovely two course meal and a litre of wine for less than £20 per couple (and they always give you little extras free so you are bursting at the seams).
My passion for Greece has returned and I cannot wait to visit again.