thew neck is still not right... looks good otherwise though. You need to have a good understanding of how the neck muscles work in order to get the model looking correct. Either get an anatomy book (if you are going to be making ppl you have to have one... learn as much of it as you can and always have it handy) or just go on google and search for the specific muscle group and look up images. Ive attached a quick sketch of how the neck needs to be shaped in order to give this guy some muscle structure. The way it is now he looks frail....
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