Understanding the wine of Sicily are not as complicated as Italian wines in general. They are fascinating non the same and my intrigue is always around the grapes most associated with Sicily; Cattarato, Inzolia, Nero d'avola, Grillo and my favorite Nerello Mascalese.
In my opinion, the intrigue of Sicilian wines comes from two primary sources. The soil and the Mediterranean sea. The soils are diverse but the volcanic soil of Mount Etna adds such a complexity to the wines that they keep you asking for more. The Mediterranean Sea provides an amazing savory character that can only come from on-shore winds.
Have a listen to Giovanni Masucci or Donnafugata wines.