While I  like constructive critique, there is also something about just dropping by to say a hello.
Or to express the like of the image.
Remember that not everyone is well versed in critique, so just saying the words of appreciation are what they do.
I have  done this myself,but do try to  mention something about the image. Some are just so darn good there is not much   I can say, but words of awe.
I know of some sites who have strict rules about how comments are to be made, and the minimum amount of words.
But even with these rules, the freindliness still kicks in and you see  the typical  words as you do in this site.
 I appreciate your mention of this, and  it has been brought up many many times, but we are a community.
The gallery now has an option to  select only critique if you choose.
You just have to get people to heed to it.
This may take forever.

"The happiness of a man in this life does not consist in the absence but in the mastery of his passions."