I think the top two are a little flat because there isn't much color in them or any contrasting colors. The thrid one is much nicer with the red roofs and the clouds on the hill in the background.
i think perhaps #s 1&2 look a little "washed out" if you know what i mean, i would think a tweek of saturation and contrast,would'nt go a miss,crops good, #3 :thumbup: nice exposure, very colourful..
Your version of Sicily looks a lot more tranquil than when I went there. We got stuck in traffic, first behind a wedding procession, then behind a funeral procession! Nice pictures, although the first two looked a little washed out. Maybe you should try upping the contrast a bit.