Image(s) you want on the signature: I will not pick images out specifically. I feel this may impair your creative freedom on the signature and thus not make it what I'm looking for. I will state characters from series or games, however. If you feel like you can make a good one out of them, then please follow that path.
With that said: Nu(V)-13[Blazblue], Chii[Chobits], Touka[Utawarerumono], Pleinair[Disgaea series], Vash the Stampede[Trigun], Aku[Samurai Jack], Ovan[.Hack//G.U.], or Zetsubou Sensei[Sayonara Zetsubou Sensei]. If you don't know any of the characters, then I will find an image. If you don't like any of the characters, I have more.
Text: Zugaikotsu ; (Also, you may want to include a "Made by whitenuts" somewhere. I'll link the signature to your post, if you do so.)
General color scheme: Preferably a darker/melancholy color scheme. (Note my current signature and avatar.)
Do you want a matching avatar: No thank you.
Notes: I personally enjoy some sort of border, but this is more of a suggestion (if you think it looks silly, leave it out).
This should be the only thing I really require: the signature must be less than or equal to 600x189 with a file size of around 100Kb or less.