I'm quite proud of my 10/18/98 sign-up date. I started lurking and couldn't stand it - signed up within the first week. Have been here daily since then. Not a prolific poster, but a prolific reader.
I haven't read this whole thread, but I scanned and saw some of the oldies: Ash (and all of his follow-on names), Clinton's A Liar, Don Morgan, Deep in the Hurtgen Forest (I was one of the people burned by the imposter!).