It may be my screen but I find all your photos too bright and at least on the brink of being overexposed if not (as in Photo 2) fully overexposed. You like that one for some reason, while I don't --- but that may be a matter of taste, too. So no need to discuss that.
But the daisies are all very bright in their white parts.
A suggestion that may be helpful: try to deliberately UNDERexpose your flower photos by one step (at least). You will get many more details. And even if later you feel you want the photo to be a little lighter than what you got straight off the camera, you can still tweak that - but the details are there. Once a photo is overexposed, what is gone is gone. In the case of underexposure, though, there is much more there.