That blue guy definately has something going on. Very original, it's almost like a blend of 5 different character design styles that makes it unique on it's own. And I like the idea of making a drawing in pen. It's a personal challenge because like you said, there's no erasing. It forces you to be skill full and get it right the first time.
So here's my second crap submission for this thread. Nothing special, if I remember correctly this was just a practice in anatomy, but, as usual and much to the dismay of my (rat bastard) high school art teacher, I strayed into super hero anatomy once more as I always did.