Ok, the bottom half of the body isn't bad, although the legas are a bit long, and the knees too low.
The top half needs serious improvement, I'm afraid.
Either the arms are too low or the neck is too long. Take your pick. Remember the arms come directly off the shoulders, not half way down the body. I'm not sure what he's wearing, but it looks like a space suit without the visor. If it's supposed to be material, make it less rigid. It's not as bad as I make it sound. The only real problem is the proportion and lack of shoulders.
The head is pretty good. Not alot to say about that, it's pretty successful. This is a real positive because heads are the hard part. The hands are quite good, although two fingers creeps me out.
Good luck with the improvements, they're very important, but there aren't very many.
IceBound Melodic rock/metal band with loads of lead guitar, clean female vocals, and more guitars! What more could you want?