I'm learning, don't do it. In several threads I see posters use little snippets to illustrate their advice or help explain what they mean, however, I see a lot of focus spent discrediting the snippet itself. I view a snippet as a sketch (my primary artistic median is drawing). I find it odd that so much attention is given to what I view as little more than a scribble on a piece of paper used to show general form. Sketches are not usually very good, they're done quickly and lack a lot of detail. If I'm going to sketch out placement for a few characters on my canvas, I'm not going to sketch in eyes, draw in fingers or worry too much about proportions. I would give you quite a look if you were to tell me "those don't look like people therefore I can't tell where they're standing." It might not be something that is related to the writer archetype but more of a problem with internet posters. While the other forums I frequent deal with different subject matter and lack snippets to accompany their opinions there is still a general antagonistic attitude.