Two things:

• The show made a huge deal of Jim and Pam's will they/won't they thing. April and Andy had a couple episodes where they're seeing flirting, I think there's one episode where they talk about maybe not getting together. And then they're together, continue to be awesome, and the show moves forward with them as a couple.

• Then, Jim and Pam's relationship continued to be a huge plot point pretty frequently. It truly got in the way of far better plots and lots of humor later on in the show. Their relationship would get shoved in the audience's face constantly. It was practically about a couple who works in the same office together (and oh yeah here's their coworkers for a few minutes), versus what I think we all wanted it to be, which was a show about an office and all the things that happen in it.