I have never started a thread, but as a reader, sometimes I am put off, perhaps intimidated, by a thread with many, many replies. I usually end up reading them, though, albeit quickly scanning some of the posts. I do appreciate posts by those members whose replies I have come to respect and look forward to. I have noticed threads where there were a great many replies, but none of the 'heavyweights' weighed in on the topic.
Again, I haven't yet felt qualified to start a thread, so these are merely my observations on existing threads and posts.