As a devout Star Wars fanboy, I thoroughly enjoyed The Force Awakens, especially the female lead Rey. Some fans call her a Mary Sue because she became too formidable too quickly as a character, but I disagree with this belief. The reason for this is because there have been countless examples of Star Wars characters who rapidly develop their capabilities due to their connection to the Force.
For example, after Revan had his memories and power wiped away, he quickly regained his power to the point in which he could defeat the Sith Lord Darth Malak. The most well-known example is Luke Skywalker, who instinctively destroyed the first Death Star after first discovering his connection to the Force and later defeated Darth Vader after four years of minimal training. A third example is Ezra Bridger from Star Wars Rebels, who was a fast learner and grew into a relatively formidable Force-user with a connection to both the light and dark sides of the Force all within only two years of training.
With this thought in mind, Rey is no different than any of these examples. During his conversation with Kylo Ren, Supreme Leader Snoke mentioned an “awakening” in the Force. My belief is that Rey was the source of this “awakening” because it seems her potential in the Force is so great that it caused turbulence within the Force. Because of this powerful connection to the Force, it would make sense that Rey would develop swiftly as a Force-user just as Revan, Luke, and Ezra did. In terms of lightsaber skills, she has spent her whole life living on a lawless planet where everyday is a fight for survival. This, combined with her Force-enhanced senses and reflexes would explain how she was able to best a wounded Kylo Ren.
In terms of character, I like how her personality is similar to Luke Skywalker’s in that she is brave and compassionate, but also brash and reckless. I look forward to how her training with Luke Skywalker will change her as both a character and as a Force-user.