Togus is right-- there's something about your first character. Many of us, as I said yesterday, have tons of alts floating around, but your first character (while probably not your best-- I didn't understand First Aid when I started playing the game, so I just didn't train it at all) was a big deal. Finishing that starting area and realizing there was a whole World out there, grouping up for the first time, and learning just how all the spells worked and what everything looked like-- your first character may not be your main now, but odds are it's still sitting there on the server, like an old friend from years ago.
This idea of a "first character" is actually especially interesting to me, as just yesterday my very first character dinged level 60. As I said on the podcast the other day, I'm going back to play the Night Elf Hunter (yeah, yeah-- I was young and impetuous, and I heard Hunter was a good solo class) I started playing the game with, and take it all the way to level 70, and then 80 when Wrath comes out. In some way, I see it as finishing what I started way back when. And after all this time playing something different in game (Horde, obviously, and classes besides Hunter-- Warrior, Shaman, Rogue, Priest), it's been extremely interesting to go back to the beginning. And seeing Outland (and eventually Northrend) through the eyes of the first character I've ever played promises to be a trip. I feel like I'm rediscovering this game I've played so much of already yet again.
What happened to the first character you ever started? You didn't delete them, did you? Were you able to get them all the way to 70? And when the next expansion comes out, will you take them further?