-Loki was even worse as the antagonist; why bring back the bad guy from the worst received movie in the series, anyway?
The worst-received movie in the series would be Iron Man 2
, followed by The Incredible Hulk
got very good reviews. Beyond that, Loki is the villain who precipitated the formation of the Avengers in the comics.
I used Metacritic to refresh my memory on that count; Iron Man 2
has a rating of 57
and The Incredible Hulk
a rating of 61
is also at a 57
, which ties it with Iron Man 2
(better than I thought), but doesn't suggest a strong consensus of positive reviews.
That's just me being pedantic, though. The problem with Loki (in the movie) is that he's a cardboard villain without the slightest of interesting motivations. At least, that was my view of the character. Other people are (obviously) really enjoying the movie, and more power to them.