Looking for an Island, available via not too long ferry ride, from Athens, to spend 3 days. Want to relax, meander through village shops, eat yummy food, sip wine, beach, nice sunset. Any suggestions appreciated.
Since you can "relax, meander through village shops, eat yummy food, sip wine, beach, nice sunset" on the vast majority of the islands, it all depends on what you mean by "not too long", if it’s 2h or less, that limits your choice to about five islands, depending partly on the time of year and the types of ferries operating during that period.
Ultimately, a difference of an hour or two in the ferry journey shouldn’t be the deciding factor when picking your destination.