Let's face it, if learning Finnish was graded like judo, I would still be a white belt. This despite years of training with an excellent sensei.
However, there are some areas of the language where I think I might be awarded a yellow or even green belt. One of these is case declensions, or the fine Art of wrestling nouns into admitting what they've been up to. Yet, despite my amazing skills, I can still be surprised by the ability of Finnish nouns to fight back.