I took Japanese for three years in high school, and am ashamed to say that I have retained virtually none of it--I was a ball of hormones and angsty self-centeredness anyway, it's amazing I remembered my name, let alone things like the French Revolution and "Portrait of the Artist As A Young Man" and the intricacies of Japanese verbs. Given time and a napkin, I could draw a handful of hiragana and kanji, I know a coupla nouns and adjectives (including "cheap whore" and "stupid") and the highly useful "Wakarimasen!" ("I don't understand!") However, until I die, I will remember the word for "satisfaction" because of Mr. Flood, the teacher, boogieing around the classroom singing "I can't get no manzoku!"
Little slice of life, that.