I actually deleted a few of my tweeter posts after thinking they were too personal. I only post personal stuff to keep up with what everyone else is doing. Just seems like posting personal crap will do more harm than good. For example if apple had a tweeter you'd expect apple related stuff not Steve Jobs saying "2nd day of surgery, wish me luck" if he wanted to do that he could just get a personal page.
I understand we probably only post this personal stuff because its what everyone else is doing and we don't want to be spammy but at what point do the personal post just get weird.
Lets use Zuzana Designs Twitter page as an example...
http://twitter.com/zuzanadesigns
I would expect, maybe a post per day or so business related, just not sure about what. Maybe some new design examples or a new client she took on or good feedback someone left her, etc... but seeing her talk about catching crabs and cooking them to me is just weird and if anything makes the company seem smaller and less serious, (Lol sorry to pick on you Sarah, you were just a good example.)