So. I'm trying to come up with a plot for my next story, and I thought it might be helpful to have a look at what's already been done. I'm only going to consider canon events, because it would be impossible to try and quantify what's already been written in fiction. I could use a hand in delineating plotlines that have already been used, although some still have room for exploration. And some have been done rather a lot-both in the show and in fiction. ;)
I'm not talking about character things explored within the plot, but the basic scenario that allows for those explorations. Also, if you think a scenario has lots of possibilities left, or should never be used again, that would be interesting.
( This is what I have so far: )