Another thing I liked.

I liked how Kylo is obsessed with Darth Vader (his Grandpa) even to the point of wearing a mask. Considering the Kylo Character it makes sense why he says "Finish what you started." Seems to me he's looking to finish what Darth started and that's going to the dark side and getting rid of all the Jedi. When you look at it that way you see that Darth failed because he listened to the light. (to save Luke) Kylo seeing himself with the same weakness of being torn by the dark and lig (But in a more batshit crazy fashion)ht.