First one for me - agree with the colors on that one! If you could've asked the dog to move just a little to the right, that would've been good..
Last two images... don't work for me either. They feel a little 'flat', as there isn't much to keep the eye interested in the photo. But the colors are nice.. I agree with you on that one.
Seems like you had a nice sunny day at the beach, and came back with some nice images.