I would like to learn to graft a branch onto a black pine after my dog got ahold of a primary brach on a smaller one last year D: I still can't believe it happened, but it was a good moment of clarity to realize that there are always ways to evolve and fix it vs. giving up. It may take a couple of years, but it's doable. I mostly don't know how small I can go in terms of what to use as stock, as a lot of the seedlings you can order are very thin.
Other than that I want to get more hands on experience with maple development in particular. I have younger, older but rough, and more refined material to work with, so I'll be able to start paying attention to the spectrum of development in a bit more detail. Pretty sure that other than the grafting, I'm only going to decandle my pines this year and focus on them a bit more the following.