pic no. 1 - the model's foot was cut off, he's in the middle, the post is distracting, over exposed. Suggest you dont cut off the model's foot, put him on the left part of the photo and give him space on where he is looking, and frame him between the tree and the post. Or find a better location, the background is too busy
pic no.2 - oh its a tree
pic no3 - burned out, over exposed. you are loosing the detail of the flower. Shoot early morning or us a ND filter, and try different angles.
pic no. 4 - out of focus, blurry, under exposed. This would look a lot better if you framed it diagonal going from the top left to the bottom right, used your pop up flash to fill the light,
pic no 5 - out of focus too
Read your histogram and enable your highlight alert. They tell many thing about your photos. Try to google "Rule of Thirds". That would be a good start...
Get outta here and shoot some more....
regards
mel