Writing on a blog, I've come to realize, is much harder than I originally thought. I prefer fiction writing; maybe it's just because I'm so used to it, though. Writing on a blog is more personal; you aren't writing about or as someone else (which I happen to enjoy doing). Don't get me wrong; writing through a character is still honest and truthful, and often a little too insightful for my comfort. You're shielded, though. You could write an autobiography and deem it fiction, and few would ever know. Maybe no one would- I suppose it depends on the person.
Also, there are no long periods of editing. I do enjoy that- but, it also proves to be stressful. I worry about making one little mistake, and then sending it live. I think that writing a blog will be good for me, though. New experiences, less perfectionism.