The actor who portrays Loki in the AVENGERS & THOR movies enjoy playing the role as much as anyone enjoyed watching! The Chicago Review Press published an email exchange between Tom Hiddleston and Joss Whedon (writer/director of THE AVENGERS) in which Hiddleston expresses overwhelming joy at the character Whedon created. "Thank you for writing me my Hans Gruber. But a Hans Gruber with super-magic powers. As played by James Mason .."
Whedon's response is almost as good. Read it HERE
And if that doesn't convince you how much Tom Hiddleston loves the role, then his appearance at Comic Con last year should.