I just added my "blog roll". From the 40 or so that I have bookmarked and check in with regularly, this is a list of blogs that I follow just about daily. If you have to select only one to read, I would choose Michael Yon from Iraq.
Every blog has its style. I do not like the aggregators like Daily Kos and others...if I want a quick splash of the daily news, I will catch the news on the hour. I want commentary...opinions on events. My list includes a very geographically and politically diverse group...except in the Iraq....that is direct reporting from the scene.