Both. Sometimes I log on with the intention of asking a question. Sometimes I see a question that gets me to thinking about other related questions, or even inspiring me to write a story or opinion piece.
Neither. I ask very few questions (compared to some) but when I do, it is because I am seeking information. I rarely ask a question just for the hellofit.
I can't think of good questions. The ones I've thought of that are good, I forget them by the time I log on.