When someone's found a subreddit that fits your criteria, you may either thank them in reply which will automatically flair your post, or you may flair your post manually.
This is not a place to advertise the sub you just made.
Post what you're looking for and someone can kindly suggest a reddit for you! How do I flair my post? If your post contains an image, this rule applies here as well.
You must post a clear, easy to understand request for a subreddit.
Don't be a jerk or be deliberately unhelpful.
Large categories have their own separate subdirectories which are linked in the main directory.