Recently did a marathon of all games in the series in preparation for BS5, and I've got to say this:
BS1: Shadow of the Templars is still a fantastic adventure game I'd recommend everyone to experience for themselves. Definitely the strongest in the whole series.
The Director's Cut.. felt a little odd to me. While it's great that they've made the original game more accessible for just about everyone, to the point where one can just skip the whole "puzzle" aspect of the game without having to google the walkthrough in order to experience just the story, they also did a lot of wrong things:
Removing deaths? Cutting George's remarks on things? A comic-book artstyle (although from a great comic artist) in the portraits/added Nico's sidestory that clashes badly with the whole animated look of the original game? Really?
I've also found Nico's story.. insignificant, lets say. But at least it makes her actually doing something in the plot, and not just sitting in the apartment the whole time, which is nice.
BS2: The Smoking Mirror is a great sequel, even if I felt that it was way shorter and easier than the original. Definitely would recommend to play it for those who loved the first game. Although its setting does oddly stick out in compare to the rest of the series, making it some sort of a filler in the middle of the main arc (and I think BS5 will do the just same.. UNLESS the templars are involved, again).
By the way, the remastered version is actually great, in comparison to the first's Director's Cut. It does nothing wrong with the core game at all, while improving on it.
BS3: The Sleeping Dragon was actually the first game in the series I've played, and I still love it. Love it more than BS2. Didn't mind the fact that it was in 3D because it still had really great art-direction behind it, as well as a stellar cinematic cutscenes that just made the plot much more epic. It will sound blasphemous to point'n'click fans, but I actually prefer the control method of this game. To me, it's much more immersive than just pointing and clicking. And I think stealth segments (hello, In Cold Blood!) were also done pretty well.
But I agree, those crate puzzles are just lame as all hell, almost as if they couldn't come up with far more, better puzzles for George to solve. Switch to the "new generation" 3D DOES NOT constitute the implementation those kind of "puzzles". As well as QTE's.
BS4: The Angel of Death was the one I've never completed before because my first impressions were not that great to begin with, and after reading reviews I knew this is the worst one in the series. The whole game feels like a lazy, incomplete mess to begin with, as well as some "plot points" (in a bed, with a non-nun) just made me like George even less. (Although Saxon's fake german accent was hilarious)
And those scripting bugs, oh, I HATED THOSE (To illustrate -
https://www.youtube.com/watch?v=5DulUopi9Gk ). Almost made me write a support topic in this forum. To think that I had to reinstall the game five, FIVE times in order to beat it, just to see the awfully rushed ending.. Yeah, I would recommend to stay clear out of it even to a die hard fan of the series/adventure game fans.
BS5 has me in hopes that it'll be just as good as the first three games. Crossing fingers that the kickstarter reward of elonging the game in two episodes didn't take a toll on the plot..