Came across a nice way to classify bloggers :
If one has to broadly classify bloggers, then there are 2 categories . First category are Linkers who link to an article and either  comment on it or help generate buzz on it. Second category are the thinkers, who write an essay / thoughts and as such do not refer to any external link perse. And  obviously there are bloggers who adopt both patterns .

Link: USS Clueless - Lots of traffic.