>>8 Well in this case it's not so much Hollywood as it is Marvel (or more exactly Stan Lee and Jack Kirby who first introduced comic Thor).
But yeah, mythology of any kind will always be a big source of inspiration and will get adapted more or less successfully and faithfully. But Marvel took so many liberties with these characters and their universe that I tend to not connect it much to the originals. Not even the familial relations are the same (Loki as Thor's brother not Odin's).
In a simple story like those in (early) comic books or Disney movies you need a villain, and the person who caused the most trouble (in this case Loki) gets designated. And they could play the character more as more complicated or as a straight forward baddie. I'd frankly like to see more of the God of Chaos side of Loki then the wreck shit up side, but we shall see.
Anyway, I'm not really against loose adaptations, as long as the adaptation itself is good, which is debatable in this case depending on what you're looking at (movie/comics). It's not like people are going to go to these for actual information, but it might make them look for the actual stories later, who knows.
But I can't really hold anything against you, it's not a bad thing to want faithful adaptations of things you care about I guess.