I don't see how this makes any sense RP wise, but whatever floats your boat.
Probably because you aren't psychic and can't read his mind? Leave the feller alone.
1 handed is viable. You kill slower and power attacks are weaker, but if you level up blocking you'll be able to interrupt more and knock down enemies
Without shield, I don't think it's viable because, if just sword + nothing WAS viable, then sword + shield would be overpowered.