Caius got me into graal, he told me it was like a graphical MUD
So I downloaded it, got my FREE (OMG!!!) account (CheeToS :P), checked out the training levels and thought it was cool, so we both got on npulse, I hated playing any other server because I didn't know how to do anything. Caius tried to get me to play Classic every once and a while, but I hated it because there was always 200+ players, It was laggy as poo on my 166MHz pc with 56k, and It was confusing for me. It took me weeks to figure out what "PK" and "P2P" meant, lol. I remember everybody messing it with bush bug, where you pick up a bush, press D, press M, and press M again, and you'd go invisible ^_^. Geovanie was sending lots of admin messages on N-Pulse too, so I asked him how he did it, and he told me he "presses this button over here, and that one over there, and viola!" lol. The day ghost mode came out, I checked out 2k1 and loved it, I had never even seen a lighteffect before, except in the screenshot of the day. I bought my P2P account the same day, and got Caius to get one too.
A lot more than 1 memory, but oh well :P