This is interesting. I've been wondering for awhile - when people ask "how's it going" I always "say good thanks, you" when sometimes it's a complete lie.
Now I know that they don't want to hear why my day/week/etc is crappy, nor do I want to know about theirs. That said, I'm sick of lying, I think I'd just like to say "shizzy, now piss off" without being rude or hurting someones feelings. That would make me feel better