For me, iOS 7 looks a little too much like Easter decorations, if that makes any sense to anyone. I think they used pastel colors a little too heavily. I tend to like deeper, more rich colors, not light, "chalky" pastel colors. The functionality looks to be vastly improved though. Perhaps the color scheme will grow on me. Also, as some others have suggested, it seems that your wallpaper can have a big effect on the look and feel of the OS, so maybe that can help too.