I watched the original british series when it first aired. I was living in Scotland back then.
Later when I discovered there was an American version I was skeptical. I sort of ignored it for a while. Then I moved back to Germany and one day I decided to give it a go. By then TO was in its 3rd season, so I had a lot of catching up to do.
My opinion is that in the beginning it was very much an imitation of the original UK version. The jokes and some of the lines were actually identical in some episodes of the first 3 seasons. But the show has been getting better and better.
What I like about the US version is that the characters - or some of them - have really had space to develop.
I mean look at Pam, she's gonna be in the sales team now.
And I REALLY hated the way the UK office handled Tim and Dawn. I hated it.
And I really, really love what the US version has done with Jim and Pam. Absolutely great.
One of my all time favorite Office moments is in the episode where Pam brakes up with Karen and Pam is talking to the camera, then Jim comes in and asks her out. My head exploded when I first watched this lol.
I was just sitting in front of my screen with this huge grin all over my face. LOL.
I guess if there had been more seasons of the UK version, their characters may have developed too. But as it is now, the US version is by far superior.
What I also like about it is that a lot of the time it's more uplifting than the UK version - which was very miserable. Especially David Brent. I just hated the guy. Michael Scott I actually sort of like - in an "as long as I don't ever have to be in the same room with him" sort of way. He has his good points. Or, as Jan put it: There are quite a few things that he's well above average at.
Anyway, that's my opinion.