With Abrams not coming back for the sequel, I just hope we get a bit more time dedicated to the characters. I liked the new actors in this film a lot, but the actual characters weren't given much to do in the script besides run from danger and do fight scenes. The original trilogy was made up of balanced stories, they just didn't throw in some banter in between action scenes to tied us over. And none of the characters feel like they have obvious arcs. Rey is already pretty perfect, we know nothing about Poe, Finn is way too well adjusted to be a kidnapped from birth Stormtrooper, and Kylo's conflicted nature could stand some subtlety.
C3PO's moment was great, genuine bit of nostalgia for me, because he got to do something that was in character (interrupting Han). I can't say the same for Han or Leia, so not sure how Luke is going to turn out.
Will I see it in the theater? Well, I'll know for sure in two years I guess. At the moment, I'm mildly curious. I really don't like how they purposely left so much dangling and unanswered purely as an excuse to have a sequel. That's not how you write a screenplay.