Do I have enough opinions about anything to sustain a blog? The question reminds me of an article I read in the New Yorker, by Louis Menand, who says:

... diaries are really written for the eyes of others. They are exercises in self-justification. When we describe the day’s events and our management of them, we have in mind a wise and benevolent reader who will someday see that we played, on the whole, and despite the best efforts of selfish and unworthy colleagues and relations, a creditable game with the hand we were dealt ... People abandon their diaries when they realize that the task is hopeless.