Overall, it's just like the short description says. It's just the random ideas I get for stories, most of them include a human in Equestria, some of them include the other way around, while some of them are just the shenanigans of the ponies to the extreme! (By the way, I spelled the word shenanigans right on my first try: no red lines underneath it :P)
Anyway, I'll probably never 'complete' these stories, and more likely than not, I won't follow them through with actual stories.
But, if it looks entertaining to me (I'm the writer, I don't want to be bored when I'm writing it) I'll follow it through with more chapters, either in the same story arc or in the same style, and make a new collection or story. (Note: I won't upload any stories until I finish a current one. Collections will always be new.)