One thing that we all have in common is that we like Plakias and therefore other similar resorts suitable for twenty to seventy plus somethings, with a good beach and tavernas, laid back Greek atmosphere, with excellent scenery and walks would fit the bill. Oh, and no lager louts.
Resorts that fit into this description that I know of are not on Crete. I have virtually decided to restrict myself to them (and Plakias of course) rather than look for somewhere new, risking disappointment (the last exception to this is my autumn 2004 holiday to Vassilikos, Zakynthos).
The list is (in no particular order), Petra (Lesvos), Scala (Kefalonia), Kambos (Samos), Tingaki (Kos), and Agios Georgious (also known as St. George South) (Corfu). But for the poor beaches I would include Haraki (Rhodes), Kalives (Crete) and Paralio Astros (Peloponnese). Matala (Crete) sounds good but I have never been there.
If anyone would like to know more I would be happy to help, but as this is a Plakias forum it might be more appropriate to contact me via my E-Mail address which I think will be displayed if you click on "Mike G".
I would add that I always (ever since the family has been grown up anyway) holiday in May and Sept/Oct so I cannot vouch that all of the places mentioned are quiet in high season (is Plakias?).