Hi there,
Firstly welcome to the CiC forums from me, great to have you join us.
It helps if you tell us a bit about the pictures, how you shot, what problems you're already aware of, how you PP (post processed) it, etc.
I have extracted the EXIF data (shooting information) and added it to each of your posts because it helps us help you quicker
The first one (water splash crown) looks to be a good attempt, I do agree with Jim's suggestion to increase the Depth of Field by using a narrower aperture.
One thing - on a couple of these, you shot at 100iso, the Nikon 'base' iso is 200, as a general rule, it is not a good idea to go below this, unless you absolutely have to, because it restricts the dynamic range available.
On the fountains shot, there is definite camera movement, but if I suggest you should have used a tripod and you already did (but I don't know because you didn't say) I'd be wasting your time
So then I'd ask; did you use your finger on the button? Because this could move the camera and to avoid that, you could use the self timer set to say 2 seconds.
Number 3 is an impressively sharp bird shot, you have used all the shooting settings I would have. It is obviously a minor shame that the top of the crest is just missing. But well done, I wish mine were this good.
On these first three, I do find the large 'signature' is a distraction and spoils the images somewhat.
The last shot, a view from a hill is a good composition, out of interest, it would be nice to know where it is. It might benefit from a little Local Contrast Enhancement (LCE) in PP - there is a
tutorial here at CiC on this PP technique.
We prefer to use real first names at CiC and it also helps if we know where you are from, so could you edit your Profiel and add a name in the Real Name field and also where you are, city/region + country in the Location field please?
Many thanks and I hope the above feedback was useful.
They are all high quality and presented in a nice large size which helps enormously.
All the best,