I have no idea...
When we first got online, around the end of 1996, my sister and I would sign up for the one month free trials, and hop between ISPs. But much of the time we'd not get round to signing up to a new one, so my internet access was patchy. But once I found the archive I devoured it all (which was a lot easier to do back then :p )
But early ones I read that got me hooked are, in no particular order:
Zoomway's
It\'s about time (Ok, there is an bit of an order, I think this was the fic that made me realise that fanfic was A Good Thing)
Sheila Harper's
A Shot in the Dark Chris Mulder's
Love Beyond Measure and
Dimensions of Loving Susan Stone's
Aliens and Strangers and
Laney and the Giant Killers There are more, but I've read so many fics so many times, I couldn't honestly tell you when I first time was.
Helga