I've never done a full, dedicated Bond re-watch, and have seen some films more times than others. Haven't seen the latest.
One thing I have appreciated more and more is how they have upped the ante with the main villain. So many of the earlier Bond villains are so one-dimensional and forgettable. Quick, tell me the name of the villain in Thunderball, and something about him other than his eye patch. They may have been fine actors in their day We got legend Christopher Lee and Oscar winner Christopher Walken, but otherwise only Julian Glover, Yaphet Kotto, and Donald Pleasance had solid acting careers that I am aware of. Move forward to Brosnan and Craig, and we get Sean Bean, Jonathan Pryce, Mads Mikkelson, Javier Bardem, and Christoph Waltz. And with them we get away from Zantera's 'secret base on an island' kinda bad guy. We also get Judi Dench, and then Ralph Fiennes when we once had equally one-dimensional, stuffy old white dudes swapping a couple lines with Bond to give him his assignment (though Bernard Lee was great as M).
I also think the "spying" in these spy films can be lacking. In many films it feels like he sorta stumbles around, gets captured a couple times, ends up in the right place at the right time, and defuses the bomb just in time.