Sad? Odd, to me, it looks like he's ready to hit the dance floor and get down with his bad self. :-)

The Miguela one looks sweet. Has a bit of a realistic tinge to it. Nice. And the Kiku pic's good, too, though I don't know her character offhand. Rather realistic style you have.

Kiku's right arm (Perspective left) is a bit long, though. :-)

The Jedi looks right, but you might want to fix his left hand (The one holding the lightsaber)... make it seem a bit more like he's gripping the thing instead of throwing it. Though that would work... :-)