Julian's picture looks... too modern, for my taste. Makes me very much so think he's the kind of person that spends a lot of time at Hot Topic or complaining about how he knew 'such and such' band before they went mainstream.
Lweoh was updated in a previous post, did anything change from that one? If it did, I don't recall, but I still like it!
With James did you find the same picture put with a 'more black' outlines or something? Or did you do that yourself?
I don't recall Gareth's original picture, so I don't have much opinion on it, other than that I notice he's wielding two swords while having only 1 sword on his sheet. That's just a minor nitpick of the art not matching the sheet though, which is something that, unfortunately, happens a lot unless you're willing to shell out lots of money for individual art of your PCs.