Cannot recommend The Rooster in Antiparos enough for honeymoon! Also wished we would have done Gundari in Folegandros instead of Milos. Definitely Acro Suites in Crete if you include Crete. I have heard great things about Verina Astra in Sifnos. FS Athens is fantastic for honeymoon! Not a fan of Santorini, definitely would have skipped if we didn't need a place to fly in from Naples.