Only saw it once... not interested in watching it again because of that emo darth vader wanna be "villain".
That's kind of the whole point behind Kylo Ren. He's the biggest Vader fanboy ever but can never be Vader. Rey said it herself. I kinda like that they did that.
My big problem with TFA is how it almost completely nullifies everything that happened in the OT without any explanation as to why things are that way.
In what way did The New Republic fail? Who are The First Order and how the hell did they rise to power? In what way is The Resistance different than The Rebellion? Why did every main character of the OT just kinda give up on each other when Ben turned to the Dark Side, wouldn't that bring them more together? Why are Jedi considered a myth in the Universe when 20 years ago a Jedi saved the Universe from The Empire? Hell, less than 50 year before TFA there still was an actual Jedi Order who acted as Galaxy Police, surely people would know about that?
And sure, some of these things have answers in the new EU or will maybe be answered in the coming films, but these are major plot points. I shouldn't be required to read some mediocre novel or wait two years for a sequel to get the basic information needed to make the first films plot believable.
All that is explained in other material (comics)... which is the whole problem. I feel like a little bit of that should have had a few lines devoted to it in TFA itself, like the council scene between Tarkin, Vader, and the Imperial officers early in ANH.