Given Kylo Ren's violent outbursts in both films, my take is that he is mentally unstable, and unlike Anakin, is actively seeking out the Dark Side to fill his instability with purpose through some thought that me must completely control the Galaxy like Darth Vader was going to do once Palpatine was dead. He's pretty much worshiping Darth Vader (not Anakin Skywalker).
We know Snoke was pulling on Ben at some point since Leia and Han know about him and mention it. They sent Ben off to Luke's school over six years ago, seemingly to center him in the Force. Luke felt this darkness, and he says he's never felt anything like that before. This means that whatever darkness is in Kylo Ren is greater than that which was in Darth Vader and Palpatine. Think about that a moment. Kylo Ren's darkness is greater than Palpatine's? That some serious darkness if the Master Dark Lord of the Sith is overshadowed by a still incompletely trained Skywalker who is mentally unstable.
We know Snoke was pulling on Ben at some point since Leia and Han know about him and mention it. They sent Ben off to Luke's school over six years ago, seemingly to center him in the Force. Luke felt this darkness, and he says he's never felt anything like that before. This means that whatever darkness is in Kylo Ren is greater than that which was in Darth Vader and Palpatine. Think about that a moment. Kylo Ren's darkness is greater than Palpatine's? That some serious darkness if the Master Dark Lord of the Sith is overshadowed by a still incompletely trained Skywalker who is mentally unstable.