Are achievements in Skyrim per character or per account on steam? If the Achievements are per account is there a way I reset them?
When I say per character I mean can the Achievements I earn on one character be re-earned with another character?
They are per account. Once you've earned an achievement with one character, you can't earn it again with another character as its now unlocked for your steam account.
And there is no known legitimate way of resetting steam achievements (From here).