Some definite improvements in the sharpness department - your apertures and shutter speeds are more appropriate, I think.


I like the first one the best - only critique there is the blown out/white sky makes it harder to distinguish the blossoms. I'll reiterate my recommendation for a CPL filter (unless the day was overcast - in that case, you'd have been better off on another day, maybe).


On the second one, it looks like nothing is really in focus. In brightly-lit scenes, a wide aperture (e.g. f/2.8) is usually used to provide out of focus blur so the subject is sharp and the fore/background are blurred. In #2, I can't find a clear subject for the image. Also, it looks a bit tilted, though that can be easily fixed in post processing.


For the third one, again, I'm not a fan of the composition - again, I don't see a clear subject or intent. Exposure is ok. If it were me, I'd have wandered down and shot a pic looking out through the closer archway, from low to the ground, with the archway in the shot to frame the bridge and trees.