I've got a suggestion. Maybe there already is something like it, but I couldn't find it. So if there is, I'd really like to know where to find it (You already got so much stuff covered here, it's easy to miss some nugget.)
Anyway, how about some series or lesson about counters? One of the hardest thing in japanese I have to struggle with, is how you use a different word for any different thing you count... I would really love some lessons concentrating on this.
KuroKuma-san, Thank you very much for a suggestion! Are you psychic??? We're actually working on a series for counter!! But apart from this new series, you can always find some lessons covering counters. Mostly those can be found in lower levels like Absolute Beginner, Newbie, Lower Beginner, Beginner,... Please brows lesson with key word search and/or curriculums
I'm sorry for the late reply, somehow I missed your answer.
Anyway, I'm happy to hear that there's something in the making. Counters and particles are my biggest problems in grasping your language, but since you already feature a (magnificent!) particles-series I thought a counter-series would figure. I'm really looking forward to it. And thanks for the hint about searching the curriculums, I will do just that!