I like the flowers on the hat; the style of the shapes gives me the impression that it is something to be worn to a beach, or to a park on a sunny day.

Only thing that gnaws at me is that the gray/blue color scheme reads as "drab" to me; perhaps a "sunnier," cheerier color scheme may liven it up a little, or perhaps just saturate or brighten the colors a tad...What is it you are going for, with the hat?