I've been to Sicily stayed in the west of the island not far from Palermo. It's less touristy I think than the area around Mount Etna. There are some great villages on the north coast, very picturesque but it can get extremely hot with oppressive temperatures. Palermo is a typical Italian town with bustling streets and overcrowded roads but pleasant enough.
Agringento on the south coast has some interesting historical buildings, The Valley of the Temples worth a visit.
Marsala in the west is famous for the sweet wine we drink on occasion.
Cefalu on the north coast is a gem with a wonderful harbour.
Whilst we were there in September a wind comes in from the coast of North Africa and at 2300 hours it was still over 45 degrees!
Overall we enjoyed our stay.