I felt the same about avengers as well. You can see Loki being a little conflicted in his actions during the scenes with Thor trying to tell him to stop, but it is no where near the same level of acting that was done in Thor. Maybe it's just Loki is starting to accept his true nature... time will tell. But that hammer scene is also epic. My gf was like, " Watching this ****ing movie again!?" and then she ended up watching the whole thing with me and going," This is actually great!" She especially loved all the little ways it made Avengers more appealing due to how well they all tie together.