1. I really liked the scene where Snoke tells Kylo Ren that he isn't the new Vader, he's just a child in a mask (and then Kylo smashes his helmet). Snoke is so manipulative, because the irony of it is that one of the central points of episodes 1-3 was just that - that Darth Vader is really just a kid in a mask.
2. The theme of the young stepping up and taking over from the older folks runs throughout the movie. This sucks in a way for major fans, but is a good concept for them to push, so they can keep introducing new characters down the line and not get wrapped up in specific actors once they get past the Rey/Ben Solo storyline.
3. The idea that there are no more Jedi masters is great, because Luke's main point that he taught Rey on that island was that even without Jedi masters, the force is still there and has its own will to seek balance. Snoke essentially taught Kylo Ren the same concept - he said the force would create someone on the light side (Rey) to counterbalance Ren's darkness. At the end we see the slave child reach for the broom, and it comes to him just enough for you to notice. It's a new beginning, and the point is that the force will show itself whether there's someone to teach people about it or not.
4. There was no "big reveal" regarding Snoke and who he was. It may come in the next movie, and a further revelation about Rey may come in the next movie as well, but for right now they're both very powerful people from nothing and nowhere in particular really. This continues the theme that Anakin came from essentially nothing as well, and the slave child at the end of the movie fits this picture also. Rey is more powerful than Ben Solo. They keep talking about his power, but she is shown as being stronger than him in their scenes. Finn follows this theme as well, even though he's not of the force bent.
5. I didn't like how much death was in this movie. It wasn't just all the people dying, it was also how personal they made the deaths. This accurately reflects people in a war, but it was very hard to watch right from the beginning of the movie. Don't watch this movie if you're depressed, and definitely don't let children watch this movie. Like episode 3, this movie was made for adults who were fans of the original Star Wars, not for kids Imo.
Along these lines, I did not like that even though Poe eventually learns how to make better decisions as a leader, he never really acknowledges the individuals whose lives he essentially took by disobeying Leia. Good for a war mentality, but I found it annoying. I still like his character though.
6. Throughout the movie, they say kind of silly things, or silly things happen, and you're supposed to just suspend disbelief and go with it - like "now that our big door is closed they can't attack us from orbit". Like really? Also near the end, when all the storm troopers get wiped out but somehow Finn and Rose are just fine. Right, ok. And Rose just happened to be familiar with the planet with the codebreaker. But I was happy to play along, just a little too aware that I had to do that.
7. Not thrilled with Luke's death. Hope he shows up as an astral projection in the next movie. Also, it definitely looked like there were some ancient Jedi-style texts in a drawer on the Falcon at one point - not sure I saw it right, though.
8. I am cool with astral projection being the next big Jedi thing. I thought it was great that Snoke claimed to connect their minds, but they were still connected later, and you have to wonder if Luke did that, or they just know how to do it now, or else Snoke was just messing with them and they were always doing it themselves.
9. A bunch of people said they really liked the character of Kylo Ren much more in this movie, and I agree, they did a good job with him.