I think you've been shooting in consistently boring lighting conditions,and also underexposing a bit. The dark tones in your images seem to "block up" very quickly, showing no detail, and you do not seem to have many images where there are what I would call "highlights". It is hard to tell exactly what is going on, but it looks almost like you've been photographing with the camera's settings tweaked fairly substantially toward a "Vivid" look, and/or that your pictures are not being post-processed quite properly,so as to pull out the maximum range of tonal values and tonal variety. Your shots, like the girl jumping on the roof, shot #6--the sunny day feeling does not quite come through right. Or the shots of her seen against the light in frames 7 and 8---the darker tonal values, where she herself is, lack "luminance"...there just is not much liveliness in the lower tones...the images themselves are of a vbibrant, attractive young woman, and maybe you're being fooled by her persona, but the photographic renderings you're showing make me think that your images need a different type of adjustment at the computer, to bring out a more "luminous" quality to the lighting.
There are soooooo many ways to process digital images,and I think your approach needs to be assisted by a skilled photoshop instructor who can show you how to get more out of the files.
