Oh, a bunch of different things! I've got a few plots involving canons and OCs, but, it's really one I wouldn't just want pure OCs for. I'm totally caught up and I've just got a ton of people I adore and wanna write/write opposite of.
I don't mind also writing canon x canon, but I typically leave just as much room for oc x canon. Or, well, at least playing an OC as one of my mains even if they aren't paired!