I hated Tyson in Tocantins, was indifferent to him in HvV, and loved him in BvW, and on rewatching all of those seasons, I realized that he hadn't changed at all, just my reaction to him. I think what it is is that he's got a sarcastic sense of humor and he doesn't modulate it at all or take into consideration who he's aiming it at. So when Tocantins Sierra -- one of the most fragile players ever -- is the target, he looks like a giant asshole. But when it's Gervase or Boston Rob or Parvati or anyone else who lets that kind of thing roll right off them, then he seems like an okay guy who jokingly says mean, but accurate, things. There are always little clues that he's a good person at heart (talking Coach off the ledge when he was crying because no one thinks he's really a dragonslayer, reaching back and silently holding Tina's ankle at the BvW reunion while she talked about her son who'd died only a few weeks earlier in an accident), but most of the time he can't or doesn't know how to tamp down on his sarcasm.