I'm giving everyone a break for beta characters. I know I personally spent all fo 5 seconds deciding on a name for the beta (Latch Vonboko, because I played 3 FFXI characters Vawn, Latch and Boko). I think the most annoying one I've see so far is Wwwwwwwwwwwwwwwwwwwwwww wwwwwwwwwwwwwwwwwwwwwwwwwwwwwww. I don't remember the exact number of w's, but it took up quite a bit of screen space and I remember being surprised SE allows such long names.
I'm surprised there are still Clouds and Sephiroths after FFXI. In that game, if you had a name based off one of those (Seferoth, Cloudx, Cloudffxi, etc) you had quite a bit to prove before people wouldn't just label you a moron and move on.