I don't comment on most of my f-list's posts, but when I have someone friended for the first time, I usually pick a post I can say something coherent on. I think it's about equal to exchanging a few civil words about the weather and traffic and so on with someone sitting next to you.
(no subject)
Date: 2006-02-13 10:30 am (UTC)Then again, I'm weird like that :)