That's Thor with a haircut :) Actually, I just grabbed the first picture of Thor I could find and the one you picked is admittedly cooler than mine. I'm sure there's many better ones than the one I picked out there--let's see, here's another one I kinda like:
I like your 'Mjolnir' response. There seems to be far more followers of Asatru than commonly believed, especially Loki a Vanir.