Most Helpful Girl
Anything that's on your mind.
There are 2 possible outcome to this:
1. you'll have nothing to talk about and there would be awkward silences since you're practically talked about everything and know everything about each other
2. your online connection would still be great in real life.
I've had both outcomes. If you get the first outcome, then don't force it. You have to have a connection in real life too, because after all, that's where it matters.