Why do people blog?

What is it about blogging that keeps people interested? And are microblogging sites, such as Twitter, more popular than the “traditional” type?

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I really enjoy following other teachers’ blogs as they have many ideas to share and twitter is also a fantastic window on to what people are interested in RIGHT NOW! The only downside is not being to keep up with all the new technologies, websites, and ideas… it’s a constant game of catch-up!

Do you follow anyone on Twitter or regularly read people’s blogs?

What do you think makes a really good blog?