Great expressions, she definitely gives the "mad" feel you're going for! The horns say "dark side" to me so I'm not sure they're conveying the correct side that she's on, but they do make her more of a fantasy character than the hairdo (and shoes) of the 2nd sketch. The hair in #2 does have a more striking silhouette. I think the pants on #1 are working better just because there's more visual interest there than just bare legs provide.
Anyhow, looking forward to seeing where you take this. Good luck and have fun!