The book I was reading (House of Leaves, Mark Z Danielewski) to get myself psyched up for househunting turned out to have a photographer as a protagonist/object of study. One of the faux-critiques in the book suggested his motivation for becoming a photographer may have its roots in "a discontinuous lifestyle marked by constant threats of abandonment and the lack of emotional stability."
Which struck me as unconvincing as motivation for taking photos but seemed about right for a blog -- a way of organising and re-editing raw experience (confused, self-contradictory, discontinuous) into a narrative of self which can both protect against losing experience (through forgetting) and sort experience into something more consistent through chosing which experiences to reinforce through re-writing.
So, the journal, the blog becomes a stress response, something used to counteract panic, a non-aggressive action used to smooth out the stop-start stutter of a life characterised by long periods of waiting and reflection alternated with times of intense activity and periods of blank time (time which does not contain chosen experiences but ones which have been visited on an individual by the demands of family, job etc.)
But the action of smoothing, editing, selecting is inevitably introducing errors; and whether you embrace your partiality* or try to fight back against it, there's still that anxiety that all this selecting, rewriting and re-editing is leading to a progressive narrowing of narrative opportunitities.
Perhaps that's why so many (livejournallers, especially) participate in quizzes, memes, or informal interviews, in which the content of a post is determined by random or external rules; an attempt to break out of your own selection habits.
Returning to the concept of "blank time" -- rewriting may attempt to reclaim parts of the stolen time as personal experience; the person blogging about an annoying roommate, new insights gained at a training course, or an awkward family funeral may be taking actions and events felt in some way to be owned by someone else, and through the act of writing, creating a version of the experience liberated from other peoples' expectations and ownership and placed instead within a completely personal (literally, selfish) context.
And right there, I do see the photograph -- in fact, some of the earliest photographs I took, odd blurred moments discreetly stolen from awkward experiences (a family outing to a beach, illicit parties at school) and made my own through the Truprint ritual of postage and money. A narrow slice of experience, lifted too fast for anyone else to notice or mind.
Which takes me back to the photographer in House of Leaves, who filled his life with pictures because the narcissism of others made him "identify with absence". But there's where it falls down for this character (a dynamic, successful documentary photographer).
Because surely, drawing motivation (inspiration) from absence would drive you to seek out vacant subjects. Or perhaps something even less active than that.
* "(life is too short for) willful triviality" - Dickon Edwards