rollin:
I try to reply to everyone who comments on my stories. I may miss one here and there but if you drop me a comment, you will get a reply.
I do the same. And I am fine with constructive criticism; not every comment has to be good. What I find interesting, though, is that about half of the comments I reply to via pop-up never reply. I guess it has to end somewhere, and someone who comments isn't necessarily looking for a dialogue. On the other hand, most of my best friends here I met through a pop-up exchange after one of us commented on the other's stories.