Catching up to this thread after being away from my computer for a bit.
I'm guilty of just hitting the like button instead of saying something, either I'm busy or on the phone (and I HATE typing on the phone).
I'm somewhat guilty of this as well. Mostly I will hit the like button most of the time when I really like an image, but I don't comment unless I have something very specific to say. That doesn't mean the specific has to be negative, if something really grabs me, I try to comment on that as well.
I actually love criticism, even when it stings a bit, because it helps me grow as an artists. Part of this comes from my upbringing in the theatre (I'm in the fourth generation of actors in my family, we're up to six now). A think of myself as a very good actor, and I've done roles where I've gotten very little criticism and direction from the director during the rehearsal process. But the roles that I've always gotten the most compliments on were always ones where the director gave me more feedback and pushed me more or at the least challenged me to thing about the role in a different way.
One of the great things about a community like this, when you do get feedback is that it can help you grow, especially since the people commenting have an understanding of how the tools work and what the challenges are.
For instance this is one of the first full renders I ever did (Aiko 4 for those wondering):
I actually use this as my desktop background just because it feels very
me, and because of that people will see it, and tell me how amazing it is. And I do like it, and yet almost right away when I look at it, I see the hair clipping through the arms and I think parts of her chest as well. I don't think I actually noticed that for a long time in this image, and I'm not sure if anyone would have pointed it out to me, had I posted it back when I first made it. But having things like that pointed out to you, definitely help you learn.
Also, although I'm a very shy introverted person, I do in part do theatre, my main form of art to be noticed. So I'll admit, I do care whether people see my work or not, even if they don't think it's great.