I think it would be easy to list the plots that I've wanted to do and have even started them let alone finished them so I will probably have to answer your question in broad strokes.
1). I've got two characters I'm half-heartedly working on, my spider Faunus Mistral student and one of Calen's sisters who I want to reintroduce at some point.
2). For a while, I was interested in doing a world build surrounding a recurring company in a lot of the threads I run but the more of those threads I run the less important I find that. Which is strange because I do still want to do a world build on Calen's fighting style which would be completely meaningless but the philosophy of fighting styles both on a mental and physical level really interest me.
3). As for plots I'm interested in once my characters have established relationships with other characters what would happen with those relationships if certain aspects change. For example what would happen with Calen's relationships at Beacon if the Shrike history became common knowledge and even if there was a sucpision that he was still in touch with some of his siblings still in hiding.