I promise I'll get some art in tomorrow, but I just want to discuss something, in response to this.
'Tude is, indeed, annoying to see. The expression above, if you saw the trailer for the new Disney movie (Which I'm excited to see!) is confusion. It makes me sad how a great cartoonist like John Kricfalusi can't tell the difference between the typical 'tude face and other emotions.
You have to understand the character to get the emotions. Here's some examples:
Johnny Bravo always scared me as a kid how sad.
See? Nothing is always 'TUDE. The main point is that it's all in the character's personality.
I'll put some bad examples up shortly.