Is blogging just grad school for myspace flunkies?

I'm new to blogging, and it may be something I outgrow in a week or two, but I admit being ADDHDTV or whatever. Fact is, last week I never would have seen myself blogging at all. It's so 21-29, and I'm so 31 (years old). Not that I'm against it. If it weren't for narcissism, nothing would get done at all, ever! I've been working at a high school in Aurora, Colorado, and when I resigned last month, all the kids tried to persuade me to make a myspace page so that they could keep in contact with me. I went to myspace for the first time, posted a picture, and immediately got bored. Then last week, out of the blue, a good friend of mine in her twenties pressured me to be one of her blogging buddies. (You can see her blogs at http://deebucket.blogspot.com/ for amusing wit, cute pictures of kids, and what not to do when interior designing.)

So the dilemma and the topic for this blog is:
Is creating a blog what you do when you're too good for myspace?

My marketing professor thinks blogging is a fad that becomes obsolete when you turn 29.

I have a healthy self-esteem. Just ask me, but I doubt that anyone wants to know my opinion on subjects ranging from the East coast bias in sports to the cultural bias in standardized testing. I may study those things, but what good does blogging do for those issues I care about?

Will you blog when you're 31?