First let me say that any feedback is better than none. There are, however, some things you should know about how I respond to your feedback:
Anonymous feedback, obviously, doesn't get answered, which is too bad in some cases, because some of you have sent me anonymous feedback that's worthy of a dialogue.
If you only send a few words, don't expect to get the Encyclopedia Britannica for a reply. I don't have time for voluminous replies to "good story" and "I liked it." I appreciate the sentiment and will acknowledge it but that's about it. Same for longer replies that state the obvious or make no comment worthy of a response.
Flames may or may not get a response, depending on my mood.
If, however, you offer well considered critique or constructive criticism and do not send it anonymously, or with a bad email address, you can expect a considered response, either to clear up misconceptions, or to thank you for helping to make me a better writer. These are the responses on which I spend the most time, even to the point of opening a dialogue.
Sometimes I'm inundated with feedback and my responses get a little mechanical, but I do not use a mailbot, and I treasure each of your messages, so keep 'em coming.