There is a certain 'stiffness' to this character's body and joints. Something that can help is what artist's call a 'line of action' (You can look this up with Google images). Before composing a figure it is best to draw these curves. They help you better align your character into correct posture and can be used as a guide to place the torso, legs or arms. Imagine that this line is like a wire bending through the center of the character. With this as a base, you can work the muscles, limbs and joints around it!

Also, another small detail... His hands need to be a little larger. You did get the spacing correct, though! The tips of fingers should end about mid-thigh, so you have that part down. Look at human figures in similar positions to help!

I hope this helps! :)

I'm glad you noticed the hands, since that's still something I'm trying to work on. I'm thinking the problem is I get extremely focused on the hands and I don't realize until I look up at the whole picture that they're out of proportion. I've heard of the line of action, but I didn't use it in these poses mostly because I use this as a reference only, but I'm trying to get used to combining both looking at photos of poses and lines of action, but thank you for taking time to help!