what's the deal with micro blogging

what is everyone's fascination with this new way of blogging? tiny little posts. many of them. i understand the need for people to just be out there as much as they can for search engine reasons, but as i read through the different statements that many people post, to me it seems like people talk about things that hardly no one cares about. people talking about what they eat, people talking about what sickness they have, people talking about what kind of trash bags they have in their kitchen garbage can....does anyone really care? if you were to tell me that every individual person does it for different reasons, like for example one person might only be conversing with their own friends and family and no one else....perhaps someone else might only be conversing with their own coworkers at their job....and those are the right reasons to be saying random things back and forth, but if you were to say that a majority of the people are trying to tell the whole world about the colonoscopy they had last Friday, then i would say B.S....probably 99% of the population who reads those posts don't care about 99% of everyone's messages....they probably only care about 1%....they just read from a select few people.....to me that is just strange though.....why do many people want their personal life out in front of everyone for everyone's reading pleasure? have people forgotten about email and instant messengers?

Can Someone explain blogging

What I mean is the different kinds of blogging there are and the pro and cons of each kind. For example people can blog on sites they do not own, like blogger, facebook, myspace, twitter or wherever else they want....or people can buy their own hosting and domain name and own their own blog. It would seem like people are choosing to blog on sites they don't own more than sites they do own. Why is this? If you choose to be on someone else's site you have to be limited with so many rules and regulations. You are at risk of getting banned or deleted at any moment and lose all your posts and information and hard work and efforts, but if you own your own website then you make the rules, and you don't ever have to worry about getting shut down because of what you say or how you say it. Wouldn't that be the better way to go? Can someone shed some light on the differences and benefits of the different kinds of blogging?