I say a greeting but its really hard to have a conversation with randoms you may never see again. What If I ended up really liking someone I was talking to and come to find out they aren't on my server. Gets to the point of "why bother, I'm only here for the 9001th run for some tomes anyways... Lets just get this over with". If everything was openworld and I was running into ppl on my server very often I'd be talking to people alot. I still don't hardly know anyone on my server beyond random names I recognize. Miss my FFXI days.