Although Darth Maul's lightsaber is certainly iconic, none are as noteworthy as Anakin Skywalker's original blade, which grasped the world's attention in 1977.
Although it's technically also Luke's, seeing as how he used it in both Episode IV and V, it's still his dad's first weapon. Having now been passed to Rey, the sabre continues to play a central role in Star Wars mythology, reiterating the centrality of the Skywalker's family feud with a deep blue hue.
It certainly looks as though it'll be Rey's going forward from now on, and while there are no familial links at this moment to speak of, it suits the character well. There's nothing wrong with a typical blue blade, and while lightsabers have come in various shapes, sizes and colours since 1977, they don't get much better than the first.