The first time I saw the film, I was a bit disappointed. I found the plot unoriginal, Kylo Ren disappointing, and the dialogue dull. I was disappointed that this was only a good film, not a great one.
Then I saw it again.
Many of my views changed. Like I said when I first viewed the film, I was disappointed in the seemingly weak primary antagonist Kylo Ren. But now that I have seen the film more than once, it is clear to me that Kylo Ren' character is not meant to be the simple villain Darth Vader was in the first two films of the original trilogy. I feel he is meant to mirror the complete character of Anakin Skywalker/Darth Vader. Kind of a strange conglomeration of the two (almost different) lives The Chosen One led. There is the Darth Vader side of Ren, with the mask, the scarred and scheming master, the exiled former master, calculating, demanding, fearsome, and powerful. There is the Anakin Skywalker side of him that is impatient, headstrong, fearsome, powerful, yet unable to completely control his emotions and pulled toward to opposite "side" of the force. (You know, sometimes I think Vader was a better Jedi than Anakin Skywalker.) This inability to control his emotions, his impatience, and stubborness are what lead to his weakening and defeat in the third act.
When Kylo Ren kills Han Solo, I believe he does not expect to feel grief, which is exactly what I believe he feels. It is this grief that overwhelms Ren long enough for Chewie to squeeze off a round and wound him. Throughout the film we are being told how powerful Chewie's bowcaster is -at one point we see it send a stormtrooper flying- and with this in mind we can draw the conclusion that Ren is seriously wounded and that he was alert and powerful enough to slow the blasterbolt enough to keep him from flying off that catwalk and tumbling to his death Palpatine style. In his impatience and stubbornness, he hastily chooses to pursue Finn and Rey in a weakened state. He is able to summon enough strength through the pain of the wound to defeat Finn (though not before he suffers another injury) however, the combination of his wounds and the fatigue from battle sap his strength enough that a Force sensitive (and in my opinion a Force-guided) Rey is able to gain the upper hand. (Interestingly enough, it seems the traits of Anakin Skywalker are to blame for his defeat rather the traits of Darth Vader). I would like to see one of you folks fight off two young able-bodied and skillful fighters after being shot in the side by a particularly powerful rifle! Anyway, when I thought about all of this, I found myself impressed by Kylo Ren, rather than disappointed.
As for the plot, I have come to believe that it was designed as an allegory for the entire original trilogy, not merely A New Hope Redux. The dialogue I have forgiven because children and people who are not as "demanding" and "nitpicky" as I am have to be able to enjoy them film too.
I believe it to be one of the best Star Wars films made, although I hope the sequel will be good enough for Best Picture. Maybe?