(No Spoilers!) They say that the villain is always the most interesting character in a story. I’m not sure that is necessarily true. And from what I had seen in the previews, I didn’t think Kylo Ren seemed terribly original or interesting – and unnecessarily flashy with his over-the-top, impractical lightsaber.
After having seen the movie though, I have totally changed my tune. I think he is my favorite new character. (Sorry Captain Phasma!)