- friends in common
- communities in common
After that I will go into your journal and read some of the entries. If they entertain me and don't piss me off, I'll probably add you.
Interests alone won't get you added.
Every so often I take people off. This isn't personal, I just need to keep my friends list relatively small. If I take you off, probably doesn't mean I don't like you. Perhaps we never connected on a personal level, or have really nothing in common.