Every time I visit the site (Though I work for it), I am looking for all the information below. And they are all important. I will give a rank for each of them. Score 1 to 6, 1 is for the first thing I will notice.
*got new invited member(s) Score: 1
*new message(s) Score:2
* your question had been reply Score:4
* wanna continue chatting with yesterday online member 5
* new comment in your blackboard Score:3
*find new member..............or more....Score: 6

(Normally, checking Answers is the third thing I do in the morning after reading messages and checking invitations. And will find a lot of interesting questions, answers and new friends here. And by the way, active answers and askers are more friendly and they are more serious about learning languages and expressing themselves.) :)