On learning Japanese, and also, how many of you know/master it?

I took Japanese for one full year (3 quarters) my first year of college, it was very enjoyable and I would also highly recommend Genki.

I had a hard time with katakana at first, but I think its because being on the quarter system, we had just rushed though hiragana and were expected to know katakana the next week... but I've got both of those down, I've just about lost all my kanji knowledge though and my grammar and conjugation is rusty.

I should probably go pick up Genki Vol. 2 since we didn't get into the second book in my class. I kind of miss leaning the language. I think I'll try to pick it up again this summer. Its been 3 years since I finished my last class, I just hope all those import PS2 games I found will be of some motivation.

Jam it back in, in the dark.