My first online games was the demo for diablo 1, ha.
As far as bests go... I'll have to say FFXI also. Primarily for the fact that its held my interest for this long, and still does. Like all MMORPGs, it can get very repetative, but overall, I enjoy the world SE created for it.
Most of my online expierances consisted of Blizzard games, but on occasion a shooter can be a nice change of pace. After Warcraft III, I thought WoW was going to be the best online expierance to date. But it just couldn't hold any interest from me, I had expected far too much from Blizzard on that project. This was also back when Blizzard could do no wrong though, and back when Starcraft Ghost was still looking like a great game.
Only other current online game I currently play, besides FFXI, is Pangya
The no pay MMORPG Guild Wars tweeks my interest from time to time, but I haven't tried it as of yet. I've heard the quests and plot is laughable, which is a big con for me. However, the screenshots I've seen make the landscapes look beautiful, which is a big plus... so... Lineage II, although I know pretty much nothing about it, has some very attractive graphics as well... although I really haven't looked much into it.
How ya doing, buddy?