I've been here on and off since '99, although you wouldn't know it to look at my user account. I was originally
USS_Triumphant, but took a hiatus between 2002 and 2004, and either I forgot my password or my account got purged for inactivity - not sure which. Then I was
Sarachan from 2004-2005 or 2006 (can't remember exactly) and dropped off again for a while - work was taking ALL of my time. And then when I came back in late 2008, that account wouldn't log in, so I signed back up with
U.S.S. Triumphant, which then got changed to
USS Triumphant when
T'Bonz changed it back after one of the holiday name changes. (Which I didn't mind, because on reflection I figured it was better not to have those periods floating around in the user database fields like that, anyway - I was a little surprised when it took my username with the periods in the first place. Well, the
third place, but you know what I mean.

)
The only site I've been on longer than this one that I still visit is Slashdot - I joined there in '98. I've managed to keep my same username the whole time, there - it requires less of a time investment than TrekBBS does, because I mostly just read, rather than commenting.