@Rat:
One Piece DOES have angst; what it lacks is wangst, or whiny angst. Ordinary angst happens in everyday life, like when you remember that time your dog died and how it, like, sucked and stuff. Wangst is when you remember how your dog died, and become a stupid bitchy little attention whore over it who doesn't know how to deal with their problems and move on.
Congratulations! You just invented the most useful word of the year! I thank you for your addition to the English language - there is now a word to differentiate between the dictionary definition of "angst" (i.e. what you described as angst) and the definition the word has taken on today (i.e. what you described as wangst).
I believe I am the one that you were referring to, joekido, probably from the OP VS Naruto thread? I have no problem with Rat's definition of "angst". However, wangst is terrible, and it's terrible because it is annoying to the nth degree. It is okay to be sad. Everyone is sad - it's an emotion just like happy and angry and scared, and if a character is never sad they are not realistic and the audience can not relate with them. However, a whiny character simply makes me want to leave a "Luffy-VS-Bellamy-esque" fistprint in the whiner's face. We get you're sad. Big deal. The worst part is that wangst is usually about something which, in the grand scheme of things, does not matter in the SLIGHTEST - it's just a bunch of people feeling sorry for themselves. One of my biggest gripes with it, however, is the fact that teenagers eat the shit up. Angst is the EASIEST emotion to write, and takes no skill whatsoever - a retarded baby monkey with one hand and no thumbs could type a realistic angsty character. Yet the writers that feed on this make way more money than the ones that write really complex, difficult characters. All because some emo teenager decided they like to read about other people feeling sorry for themselves because they, too, feel sorry for themselves? Please. I'm one of the biggest geeks at my school (admittedly), constantly and I'm the same age as all these self-sorry shitheads and I couldn't be happier, because even if something bad happens I shrug it off because I know it won't matter in a month. Yeah, some of them actually have the mental condtion of depression, I get it - it runs in my family, don't think I don't know what those people are like. However, the majority of these kids are just sorry for themselves.
Wow, that got off-topic fast. Sorry for the rant. It's just that people that always go around saying "I'm depressed T_T" and don't do anything about it should be shot.
Anyway, back on topic: The closest we ever got to angst in OP was Vivi, and that's the closest I hope we ever get. The thing is, even though Vivi was depressed about the problems in Alabasta, she still knew how to smile. She still knew how to have a good time. She was only depressed when she had something to do, or when everything seemed hopeless. My opinions stated abovemade me like her situation, actually, because of when she was being particularly overworried Luffy slapped her into realizing that worrying and being depressed does absolute jack. I trust Oda will always keep Oda lighthearted and not take the shortcut by angsting it up.