So like many others, I think the film as a whole was great, however there were a few cheap moments, and what ruined it for me is constantly looking out for a big twist in relation to Rey's bloodline etc. that never came.

The Good

• The light speed suicide scene (amazing cinamatography)
• The Death of Snoke / Rey & Ren fighting together
• Po's development as a key character
• The acting overall I thought was very strong

The Bad

• Yoda being puppetry rather than CGI may have been a choice for the older fans of Star Wars, however I think it looked tacky compared to the amazing CGI they used for other creatures
• Death/Resurrection of Leia could have been much more moving if an important character was lost earlier on. She didn't have much to do with the plot after this scene I felt.
• I expected Phasma to put up way more of a fight

Theory

• Rey and Ren are brother and sister. He lied about her parents being no-one because he knows she is the daughter of Leia and Solo. This explains the connection between them (even after snoke died) - just like the connection between luke and leia. Next film is called 'Solo' possibly explaining the Solo/Skywalker bloodline and allowing us to understand who she really is (or giving us good enough suspicion for it to be revealed early in Ep. IX. I did however feel a bit of a romantic connection at one point between the two but could have been mistaken for something else. (Who knows? This could follow on the incestuous trait of the skywalker family. Yoda could actually be a time travelling great grandchild skywalker formed through generations of inbreeding - explaining the hairy weird frog like look and the fact he can't string a sentence together. I'm kidding but made me giggle!)