When I post to a thread, I generally try to refer my comment to the original question asked. I feel the thread belongs to the person who started it and try very hard not to lead the thread off on a tangent.
If I have no answer to the question, I generally don't comment. I just assume the person who started the thread is not going to want to read dozens of "I don't know" answers.
If a thread is a "Look at my new quilt" type of thing, I do try to say something positive about the project.
I never really feel ignored on this board. I've never started a thread that got no responses. I don't really expect 100's of answers to my questions. Generally, any one of the dozens of expert quilters on this board can answer my question and send me on my way.
I have no complaints about this board. The people are all wonderful and the information is incredible. I just wish a few of you were closer to me!