I think he makes for a more real villain.
Contrast the character of Vader vs the character of Kylo.
One was indoctrinated into the Jedi. Had a mentor who acted as his father. Was manipulated and swayed into questioning everything and everyone. Lost a mother and slaughtered aliens. Was tricked into beheadig a foe. Then killed all Jedi and kids. Then tried to kill his wife in a fit of rage. Then fought his best friend.
The other had a father and mother both famous. Was turned over to his even more famous uncle (some missing back story here). Turned against them, joined a gang, fought back, was mentored by an unknown leader, given a prominent position in a powerful organization. Does something bad to complete his circle of darkness (when does the spoiler timer expire)
Kylo is the epitome of a spoiled 1% teenager. He's a comment on children of today. Vader was a statement about the pure evil bad guys of the past. They did what they did because there was unwavering anger deep inside of them. Kylo is a spoiled kid who grows up resentful - likely because of who his parents are and what he is expected to be. So he's whiney, prone to lash out at anyone who tries to elicit authority over him, thinks he's stronger than he is - and ultimately just wants to have what he can't. The question is how far does he fall before he gives in.
The Kylo piece has been debated (and of course I'm not helping) but in terms of a story he is a very well designed character brought to life perfectly by Driver. Whether he's a character you like I guess is a different story.