*sniggers* I think it depends on the fandoms you share as to how much you remember.

If you're both into West Wing, of course you're going to remember that the person loves character X. If you're both into... Gundam Wing (not that I really am), of course it's going to be a little easier to remeber that she likes Trowa nad can't stand Heero.

I found it really hard on all the questions relating to fandoms I'm not actually in. You just don't remember those details about people. *g*