he seemed pretty garden variety in the first act and most of the second.

oh yay, a black mask, black hood and altered voice. how evil.

but his mask-less interrogation scene with rey really exposed him for to a petulant, insecure little sith. he couldn't break her and even cried. cried!

then killing his father in such a fucked up way (the whole theater cringed as solo's lifeless corpse fell into the abyss) really put him over the top.

so it's basically ren vs. luke in the episode VIII duel, right?

(also, rey lightweight entertained the dark side for a hot second there. something to keep on eye on.)