I saw the British version first and LOVED it-- so when the American version came out and it's first few episodes were essentially remakes, I felt like it was a knock off, and I really didn't like it. I left it, but came back to it later and once they weren't afraid to do their own thing, and clearly set themselves apart, I started to really enjoy it as it's own thing.
It's sort of like an Office shared universe, I feel like they actually compliment each other at the end of the day.
That said, UK sensibilities say its okay to just do a short run of a show and be done, where as the US way is to run it until it's cataleptic. Like all great American sitcoms, i think the US Office went one or two seasons too long. Still gems in those last years, but the ingenuity was gone.
...how's my OIQ?