Saw the movie at my local cinema in glorious 2D and I enjoyed the hell out of it from start to finish, I thought I'd just raise some points I liked and didn't like and then if anyone wants to talk about any of the larger themes of the movie or the minutiae, this would be a great place to do so.
Onto what I loved:
The characterisation of Bond and M, we actually got to go much deeper into the characters than ever before, Bond gets nostalgic over the way things used to be, starts feeling age catching up with him both in himself and the new MI6 officers (Q in particular) being ever younger. I loved that Bond was a complete wreck after the opening but found himself again at the end when practicing his marksmanship skills with the Skyfall estate groundskeeper Kincade. The final act of the movie with him returning to presumably his family's ancestral home really made him feel more human than ever. Judi Dench's final appearance as M was more heartfelt than I expected too. I thought her reading poetry her late husband enjoyed was again, something that made her feel more like a human being. I didn't expect her to die either and that final scene in the church was really quite unexpected, Bond crying too was about as much emotion as has ever been in any Bond movie to date, perhaps all of them combined.
The general look of the movie was so well done that I was blown away constantly by so many of the scene's gorgeous designs. Shanghai was a vivid electric blue, the casino with the komodo dragons was blazing red and the end at the skyfall estate with the smoke rolling over the hills with the glow of the burning house was just beautiful, it was almost like the opening credits in how stylized it looked.
The nods toward past Bond movies and their traditions really brought out the nostalgia in me big time. Q mentioning an exploding pen and requesting Bond bring everything back in one piece, the actual Aston Martin DB5 from goldfinger, complete with front mounted machine guns and ejector seat getting their dues was close to being cheesy but executed extremely well. All the old school music cues right from the get go and the return of Q, Moneypenny and a new M tied up the movie so well that you could almost have this be the last Bond movie ever or the first and it would suit either bookend perfectly.
I only have a couple of complaints with the entire movie, mainly that the villain (Javier Bardem) wasn't that threatening to the general population and as such there wasn't really that much at risk for London or the world in general. There was no nuclear satellite waiting to crash the entire world economy or a chinese nuclear weapon that could destroy a continent. When he explains to bond that he could crash a stock market, or destabilise a government, sell a country etc. you just don't feel threatened whatsoever. The real threat is towards Bond and M and this focus on them specifically takes away from the usual global threat associated with Bond villians of old. The character himself was extremely creepy though, especially when showing the permanent damage from surviving his attempted suicide.
I also felt there could have been a little bit more spy business, infiltration, intelligence gathering, that sort of thing, but thankfully it didn't try to be an overblown action movie either, and that's absolutely for the best.
The themes of tradition, faceless enemies, and the value of human life were woven throughout the movie and gave you something more to think about than what was being presented on screen and I think they were all handled rather well. Trading Silva for 6 agents seemed like the right thing to do for M at the time but nobody can ever know how much impact one person can have on the future and Silva certainly made a greater impact on MI6 after being cast aside and left to die than he may have if he kept operating there. There's emphasis on the impact human operatives can have in a world dominated by technology and the internet with parallels to the this argument being shown in the form of 007 and Q when they first meet.
And damn, Bond flicking the M4 up with his feet at the end was so badass that you just know he is back to his best, and for me the movie was a return to form for the franchise as a whole.
The only question left is where do they go next?