Eventually, I just want to walk into a shop or e.g. a bar and just talk to people without having to think a lot about the language itself, just enjoy the flow of the conversation, no matter where it leads.
Since it will take me a while to get there and I’m not interested in anime or manga, the second best thing is the JLPT. I somehow got it into my head that I want to pass all of the exams and the thought of reaching N1 one day is exciting. That is a bit lame but that is what it is.
Thirdly, being at a level where I can read books that I find really interesting and just focus on the content and not on the language would be exciting. I would mostly be reading books that would available in English anyway but read them in Japanese for the sake of practicing Japanese. But finally getting back into reading interesting content, intended for boring adults, no images, no simplified language would be great.
For example, I saw a book about Nietzsche (with some German text on the cover, which is what had caught my eye) in a tiny convenience store in Okinawa and I just ended up buying it because I thought it was fun. I might be able to somehow fight my way through it on a Kindle but since it is the printed version looking up every word I don’t know would take me forever so I believe it will be at least 2 years before I can attempt reading it. But the thought of being able to read my little Ishigaki konbini book about Nietzsche is exciting. The day will come!