I have a few accounts, and the one I use most is my personal (non business) account. I chat in there with like minded people about things that interest me. A lot of NHL playoff hockey chat recently. It's fun.
One of my other accounts is more business oriented. I do way more reading than tweeting on that one. I find there are many people who can't seem to stop tweeting personal information. I find myself wondering WHY on earth these people are sharing some of the information they're sharing.
There really are some different people out there.