blasphemy!
most intimidating? no way. Vader was more intimidating. But I think the most intimidating to date is Maul. They really let an awesome character slip. Maul is the Khal Drogo of a galaxy far far away and Khal Drogo is the Darth Maul of Westeros.
Ren's mask was ok, but it was too dirt bike helmety for me. His light saber was cool but the hand/cross guard had no purpose. it was just there to look cool, which it was.
voice was good, demeanor was good. But when he lost his temper i felt it made him look emotionally weak. when someone failed Vader he rape choked them with the force, not throw furniture around and slash up his office.
i agree with krich though, he nailed his first scene. that was a badass entry scene, set up a great tone with his character and that's why people are disappointed that it fizzled out toward the end
