Some nice shots there but I hope you don`t mind me asking if you are using Auto ISO as the pics are very grainy?
If you are,may I suggest you try setting the ISO yourself;you should find the images are better quality.
As a rough guide I would use 100-150 ISO for sunny/bright.200-250 ISO for overcast,and 300-400+ ISO for very dull conditions.
Try experimenting with different settings on your camera,and see how things turn out.