I think his face does look a lot like The Rock's not something I'm good at, capturing real faces! Nice work! But I think the pose of the outstretched arm looks a little unnatural the upper part twisted a bit too far. What I usually do when working on a pose is try to get my own body into the poseslowly, so I can see what bones are turning what way and how much and then try to duplicate that on the model. It takes time, but what doesn't! Keep up the good work and never be too shy to ask for criticism!