Comment and I'll:
1. Tell you why I friended you.
2. Associate you with something.
3. Tell you something I like about you.
4. Tell you a memory I have of you.
5. Associate you with a character/pairing.
6. Ask something I've always wanted to know about you.
7. Tell you my favourite userpic of yours.
8. Tell you that you must post this in your own journal.