Only saw MI 1 entirely, or maybe MI 1 and MI 2, but not sure for the second one, tried to watch the first JB with Sean Connery...
Finished by no longer thinking I might not watch JB in their order of releases but the ones with the 2 JB I prefer. So I'm on my way to watch the 2 ones with Timothy Dalton and the 4 ones with Pierce Brosnan. Heard GoldenEye was solid too. I've already quite finished the 1st one with TD, just 15 minutes to the end and I did enjoy it but I had already seen the 2 best scenes on Youtube, plus near the end I'm not really a fan of some things...
Anyway in my mind TD and PB stick the most to the idea I have of JB. Sean Connery not enough elegant, Roger Moore not enough serious. Pierce Brosnan was supposed to start sooner but he was filming Lexington Steele I think. TD looks like a more dangerous version of PB

Also some scenes aged a certain way and feminists would be shocked watching movies and discovering how women could be used to lure enemy...
I enjoyed the old TV show of MI. I think movies might don't have the elegance characters had. At least from what I remember.
I feel Roger Moore was more interesting in The Persuaders ! Their duo was perfect. Really liked Tony Curtis' character, his banter.
And he was nice dubbed too.
+ maybe the best intro and music for an old TV show even if old TV shows' musics were great in general
EDIT : Remington Steele