I first went to Zante in the 1980s. Later, when DC were small we stuck to Spain and Portugal where there are more amenities. Last year went back with three teenagers and loved it. I had forgotten how lovely the Greek people are, although their lack of tourist infrastructure is still frustrating. Almost anywhere you go in France or Spain will have lovely promenades and parks whereas in Greece you are very lucky if there is a pavement . We went to Tsilivi, chosen because it's a largish resort but not an 18/30 destination (Laganas - avoid). Stayed in a small hotel on the beach. Lots of great restaurants, a long narrow beach and some nightlife. We went on a lovely boat trip.
Thanks folks - will have a look at the places you have mentioned. We can get cheap flights there and I was hoping to get a boat from there to Kefalonia as well. I had forgotten how much I used to like Greece!