I made a lightsaber at the Disneyworld Star Wars area about 6 years ago (my parents took me to Disney as a graduation from college present since they couldn't take me as a kid), and since it had sentimental value, all my SW gaming characters have had the same one-- blue saberstaff with an asymmetrical handle.

When I did a Knight of Ren character, I decided that my interpretation of Kylo's failsaber was that the Knights made their sabers out of the kyber crystal salvaged from a famous sith saber, thus the damage. My character's crystal wasn't fractured like Kylo's, but it was only a small shard, so it was the blade of a naginata-style saber-spear made from lightsaber resistant Mandalorian iron. /extranerd