About 2 years ago I had a wonderful evening of tasting Greek wines. They were good enough that I ended up purchasing ½ a case of them.
Right after the wines arrived at our home good friends of my wife and I came for a visit from Connecticut. They had recently had visited Greece. I shared my passion for the Greek wines that I had tasted and asked her want she thought of Greek wine she had while there. Amanda gave me this shy kind of look and said they thought that they were not very good.
It dawned on me that she was probably influenced by the taste of the wines sold locally in Greece.
As more and more wines arrive in the US wine market the truth is that the wines sold internationally are probably far too costly to be sold where they are made.
If you have had the misfortune of only having locally made wines give the Greek wines a 2nd chance. Those that arrive internationally will probably surprise you with their quality. I've attached an article talking about the specifics of some of these wines.