Having dated a gamer girl and now a "normal" girl, I have to say it both have it ups and downs.

The gamer girl did play more than me and often I would end up getting bored far faster then her with a game. And we newer really got anywhere, because she/we had to raid something lame in a game.. But it was cool that she would drag my ass out of game just to play.

Now dating a "normal" girl we do get out in "real life" much more. But sometimes I just miss that I can sit down and have a good evening of gaming with her.

There is a few games that was released before 2000.
Meridian 59 - Released in 1996
Everquest - Released in 1999
Asheron's Call - Released in 1999

This is according to:
http://www.mmorpg.com/gamelist.cfm/show/all/sCol/estimatedRelease/sOrder/asc