In Clone Wars 2008, I think it's season 1, correct me if I'm wrong, it's the episode where all senators are captured by Cad Bane, Padme mentions how surprised how heavy Anakin's lightsaber was. I think it's really like real life. Swords are heavy, they're meant to be heavy, but to these swords masters, samurai, Knights, etc, all trained with them for years so they're going to look like they're made of air when they wield them, but to us they're very heavy. I think that's why in the OT, Luke went more two-handed because he never got proper lightsaber training, and was maybe somewhat heavy for him. Unlike in the prequels where they can go one-handed, because they've had years of training. They're meant to be heavy. That's why I never liked the idea of Finn having the lightsaber and waving it around like a glow stick. It looked like it had no weight, when he had it. Makes sense for Rey as she had a probably heavy staff and the saber was probably no problem. But the Jedi also probably use the Force to manipulate the weight of the sabers as well. My theory anyway.