Author, per the Draft Forum's new policy: http://www.scp-wiki.net/forum/t-10629348/new-draft-forum-policies authors who have not yet posted a successful mainsite article are now required to get their basic concept(s) greenlighted by two experienced reviewers in the Ideas Critique forum and/or IRC chatrooms before asking for feedback on a full draft.
Please first go to the Ideas forum or the chat, give a quick, properly formatted summary of the concept you want to write up (don't link the draft unless someone requests it), and reviewers can help you ensure that the premise is something that will be successful with the community audience.
During the conceptualization stage, reviewers can also assist with letting you know if something similar already exists on the site, and inform you about any cliches/pitfalls/other typical downvote reasons to be careful of with your particular idea. These elements are more effectively addressed earlier on in the writing process.
If you have already received the requisite greenlights, please note from whom and where you received them. If you would like to receive draft critique without going through the greenlighting process, please use the IRC chatrooms to request reviews.