Wassup Wickerfire, I'm ThisisBo but the folks around here just call me Bo. I joined early this year (mid to late April), and was paourt of the rush that October described, and he's been here MUCH longer than most of the online members, excepting 3J and Endmaster.
I'm also probably on one of the lower teirs as far as the CYS status hierarchy is involved. Zikara is known for her scripting (she would probably be in a mid-upper teir if I was to make one up right now), Endmaster is known for his breath-taking stories, October is known for... I don't really know what he's known for, but I've always considered him very logical and rational, and he's been here for an epicly long time. 3J is known for his intelligence and commitment to the site (as far as I can tell), and on a slightly lesser level, his stories. His stories are epic though, so you should totally check it out.
Rule 1 that I can give you: 3J is the stweard of CYS. The all-mighty creators are no longer around due to the sudden development of a life, but I've heard that alex comes around occasionally to fix the odd bug or award a trophy. 3J's a pretty fair admin (just consider him the chief admin, although there are several othersNo this isn't a very popular site, but it's one of the best in my opinion, and those that stick around long enough are normally devoted to the site.
As for the history of the site, here's a great article written by none other than the creator of the site:
http://www.myadventuregame.com/help/aboutus.aspx
Haha, I wouldn't diss you for liking or waiting a story about Vampires, however I might if it's poorly written. I enjoy all well-written stories, I didn't expect to like a story about finding out a ghost's past by finding seperate items, but it was so well written that I loved it.
Well... tags are relatively simple. Just look at them and see if your story fits. Is it the first part of an upcoming story? Then label it as "part of series". Is it supposed to be funny? Then add the tag "Humorous". Without reading the story, I can't tell you how to run your story, but I'll get around to reading the draft sooner or later.
Hope this helps, I'll be happy to help you whenever I can.