Phantom Menace, easily. I won't go into a major explanation why since there's already a thread for reviewing and rating the Star Wars films, but despite having flat characters and the plot having some major contrivances, it still added some interesting aspects to the lore such as the Jedi Council and the Sith along with at least doing a decent explanation of what has lead up to the events of the movie. Whilst I found the politics and Midichlorians poorly executed, I didn't find them to be something that broke the franchise. In an overarching plot that centred around the Old Republic becoming the Empire, political intrigue was inevitable and whilst breaking the fantasy elements, Midichlorians make perfect sense to have as an explanation for superpowers in a sci-fi setting. I also don't find Jar Jar to be as awful as most sequel trilogy characters. He is dumb and poor comic relief, but at least he doesn't have a contradictive personality and plays a decent role in the plot. Also, a lot of the flaws of TPM and the prequels in general are fixed by The Clone Wars.
Comparatively, The Force Awakens does absolutely no effort to explain many key details about the setting such as how the First Order gained superior military or technology or why the Resistance is the only military force against them. It also has completely contradictive characters that makes the prequel characters seem like geniuses; Finn can't shoot those he's been programmed to hate, yet has no problem killing his former allies (making the "Traitor" Stormtrooper the most justified character in the film), Rey immediately changes her mind about BB-8's worth, Poe does absolutely nothing to track down BB-8 when knowing he's on Jakku, Kylo acts as though it wasn't obvious BB-8 was on Jakku. Then there's Maz Kanata having nobody to blame for her home's destruction but herself when calling out "HAN SOLO" to any First Order spies that could (and were) nearby. It also doesn't help that Rey's character is the definition of a bland Mary Sue with far less of a reasoning for her power than Anakin's poor "Chosen One" role, especially with her being good at absolutely everything.
Of course, it's plot is just a rehash of A New Hope with additional mystery-bait that goes nowhere, compared TPM actually trying to take the franchise in new and potentially interesting ways. Whilst the novels have put in the effort of explaining the state of the setting, that's still far harder to sell as retroactively salvaging a film than The Clone Wars did when TCW only needed to really fix the character writing of the prequels, which is far less of a concern in getting into a movie than it not even doing the basic task of explaining what's happened in its setting properly.
). Only thing I'd add is that a God complex villain wanting to wipe out the unworthy humans is by no means original even within the confines of Shonen battle series, since Saint Seiya was doing the same thing with far less hypocritical and far more intimidating villains since 1988.
) more? Phantom Menace or The Force awakens?
my power level list. 
