Sometimes we would hang out on AIM and see who could answer questions from newbies the fastest. ("Which Final Fantasy is Culex from?" being a favorite.) Other times we would just talk about life. I remember talking with my best friend from those days (the one who disappeared) on the night the US invaded Iraq.
Nostalgia goggles and all, but I miss those days of the Internet.
I used to be "the young guy" in my local group back in the late 2000's and I often wondered what games we would play if everyone had access to a top class PC back in the day.