I voted 'be kind...' typical of me.
But that depends on my relationship with the other artist.
With some being brutally honest is what they need to awaken their inner genius.
While with others a 'nice lie' can sometimes spark encouragement.
While I do not know you personally Mirella, I can be brutally honest when I say, "Icequeen" should be your next DD.

if I can't say something good I have learned on here that most of the artist don't want to hear anything bad about there art so I just don't comment, and I go on to the next one.

I am always genuine with my feelings, so If I like an artwork, I'll tell how much I like it.

I always try to be kind..But i can't lie..
If i like the work VERY MUCH,it shows in my comment..
But sometimes i don't have the time to comment even if i'm crazy about it..
I always try to comment though...

I was commented Your works always true!