First one: I don't really like that gradient map combination on it... Try a B&W?
Lighting is OK-ish. Is that a clipping mask I see? If so, I like that. The bordering is kinda messy, but I like the sharpening in the middle. More contrast and flow would make this a lot better.
Second one: I like the effects, but try to keep the lighting consistent for more effect. There's light coming onto the right side of his head, but there is a projection of light over his left. So that's kinds odd. Nice splattering. I'm not too sure about the clipping mask cuz it crowds it a little. Maybe a smaller clipping mask would do better justice.