Locked.
Friends only.
Comment to be considered. No comment, no add back, end of discussion. I am always on the lookout for new friends, so if you think we have something in common, drop me a line and let me know where you found my journal, and I would be happy to get to know you.
Otherwise, I spend a lot of time reading my list, and even if I don't comment on everything, I probably read it. I don't expect a million comments on my entries, but if you're never going to talk to me, then don't add me. This is a personal journal, and I only want people who want to interact. No lurkers please.
Pluses: if you're active on LJ, if we have mutual friends, or a lot of common interests.