I felt like the elves of Alagaesia reminded me in a sense of Vulcans. Cool, aloof, superior, controlled and logical, their emotions rans deep and repressed so when exposed were far more dangerous than human anger that periodically had more release and expression. (Responding to a pinner who didn't understand the characterisation of the elves)
The thing that bugged me most about this series was that Arya was supposedly more mature than Eragon. And yet she would get super angry at the slightest provocation. Plus, the way it ended made no sense.