So far, and I haven’t seen the 4th, there is something a little off about some of the sets. They are just a bit too obviously CGI. Maybe that’s just jaded from having seen really good CGI, but there were definitely a couple spots where it didn’t look very good.
OTOH, they actually did film on location in some fairly beautiful areas, so there are some nice panoramic views from time to time.
There were some people who were evil, no doubt. But there was also the whole White Walkers thing, pretty much pure evil.
In WOT, there is the “Dark One” who certainly portrays the entity of evil, and has minions who follow him in his evil ways, but it’s a bit more complex than that. Been forever since I read the books, so it’s hard to go into more detail, and I don’t know how much of it gets into the show, so it may be irrelevant, but many of them were more fallen heroes than actual villians.
There are no unflawed characters, but there are a few that are consistently on the side of doing what they believe to be the best for their people/kingdom/world. That’s as close to “good” as any of us realistically get, anyway.
There were romantic relationships and even sex in the books, but certainly not in any sort of graphic detail. I think it was along the lines of, “and they went into the tent together…” “Next morning…” I don’t know if the show will be more or less explicit.
A whole lot of people do die in WOT, some of them in some fairly unpleasant ways. I think the show has been a bit more graphic in some of this than the books were, but it’s still no Tarentino slaughterhouse of horrors.