I don't really like the idea of being friends only. In actuality, I'm a total exhibitionist who enjoys sharing personal information with the people who least want to hear it. However, I don't enjoy putting personal information up where employers and potential employers can find it, hence the lock.
If I know you, I'll probably add you, but I'll warn you that while my life is fairly interesting, I treat this more as a journal than a blog. The topic is me and what's inside my head. I find this fascinating; you probably will not.