I'm thinking of starting a blog/journal

hmm, well

i would say you should keep a blog/journal only for yourself, and not worry about an audience. audiences may or may not materialize, but either way, it should be okay with you.

if you wait until i get around for paying for livejournal, i'll give you an LJ code (you generate tons when you actually pay). but the one free code i got with my free journal has long since been used.
 
the problem with boards is that they're not archival, and you also post on the presumption that your post is at least marginally interesting. i like LJ because i can post boring accounts of my day and not care if they're boring or full of obscure and unexplained references and people, because they're for ME. and they'll be there in five or ten years so i can look back and see what i was like.