Community Property

No one can predict what direction a TV show will go.  Not even its creators.  In the first season, early on, Community seemed to be heading in a pretty clear direction: Jeff and Britta were the main couple.  Pierce openly, and hopelessly, wanted Shirley.  Annie secretly longed for Troy.  Abed was asexual.

But here we are, almost done with season two, and things haven't turned out that way.  Jeff has had relations with Britta and Annie, but is attached to neither--in fact, Britta often plays the wet blanket.  Abed and Troy are close, if not physically intimate.  Shirley even did it with Chang.

I'm not sure why things have gone this way, but I think the producers started to get a feeling for the characters and wanted to go in new directions.  And they didn't want a Cheers sort of thing where you've got Sam and Dianne at the center and everyone else spinning around them.  I think, as the title implies, they were looking for an ensemble piece.  Everyone has their part, but nothing is quite guaranteed.