Blogging vs facebook

I never used to use facebook but use it more now - at the expense of starting to blog again. There are a couple of things that make facebook preferable. I find it more interactive, whereas blogging was something I viewed as writing for writing's sake. Right now it's the interaction I prefer. I also like being constrained by the length of facebook status updates - it prevents the sort of rambling I'm engaging in at this very moment. Being forced to get to the point and eliminate superfluous information takes more thought than blog writing. However, blogging has allowed me to "meet" online people I would never have known otherwise. And I've appreciated all the comments on my solar cell work. But facebook only it will be, for now.