to be honest, ive yet to see an original idea in the crit section... if you worry about your pictures/ideas beeing stolen...dont post them...anywhere.
yet i think the hardest lesson (and one reason people are put off often), is that your ideas arent as precious as they might appear to you. your personal and unique take on a nightelf-archer (what an amazing concept), might not have the impact you estimated. eventhough its your first time, weve seen it a thousand of times.
one thing that (to me) got lost, is that people who are striving to do art for a living, are recognizing that it is hard work to get there.
"how to improve on that....", yet havent even done their browsing on the forums, which would bring up some answers and more important questions.
to me it seems that this is all going wrong, because people still seem to think, that something coming for free, has little value and can be treated easily. people fail to recognize that art is a product of effort (even if some prominent pictures carry the impression its not).
most of the time to me this is like ... a drowning man asking which move to make next, thinking this one (and only this one) move is a fundamental lifesaving action, and they lived happily everafter... yet would never consider learning how to swim...