Skyfall was a solid movie in its own right but as a Bond movie, it was one of my all time favourites. Unlike Quantum of Solace, I felt like they actually took the time to tell this story and the pay off was worth it.
Something I found interesting is the idea about Bond getting old and how the job of an MI6 agent is not something you can do forever. It makes me wonder if they might explore some of these themes in the next movie.
It's true that the last 1/3 of Skyfall didn't feel like a Bond movie at all and I think that's why I loved it. The Daniel Craig Bond movies have always taken a different look at James Bond and Skyfall was no exception.
Like I said, great movie. Execution on all accounts were solid like you'd expect. I hope Mendes gets a chance to do the next film.