yeah, maybe try more angles and try to shoot in different hours, I don't know what happen if you shoot cherry blossom in those magic hours coz it will probably change the colour of the flowers.
If you like to over expose your pictures you should try to make your photos in style and more artisitc so that people know you are over exposing in purpose instead of over exposed by mistake, don't ask me how coz I am a noob too, try to go to flickr and see how other people does it.
DR is dynamic range, your camera should have a function that helps you recover under/over exposed detail in clipped areas, you can even do HDR in photoshop, google it yourself la.