I often open a thread because it sounds like an issue I'd be interested in and would definitely respond to. But my interest quickly evaporates if I see a long rambling opening post that would take ages to read, and even longer to decipher character A,B,C, and D and work out their relationship to the OP and her dilemma. I usually just click off after reading a couple of sentences.
AIBU to think posters should really go back and try and cut down long posts, leaving just the essential information, if they want to maximise responses?