I think the best way to get to learn about someone is to work on something together, followed by doing absolutely nothing together.
Online conversations generally bore me, they're so often contrived and basically stripped of all humanity (also guilty). If you reeeeally want to get to know me then DEMAND that we hangout. I will resist, but ultimately cave. Offer incentives like booze and sex, these are generally effective for most people though so (lets be real) no surprise there, but effective nonetheless. To clarify: I have never actually met someone from online, so don't get the wrong idea, I'm just spit balling here.
If you look through my profile, follow the links, and lurk thoroughly you might even feel like you have a sense of me, but this will turn out false, as who I am is dependent on who I am with.