Best moment: The Heidi and Lauren reconciliation.

I teared up when Heidi teared up and could really relate to Lauren feeling she knew how to be best friends with Heidi, or enemies, but not in between. I thought this was a shockingly genuine moment for the show.
Next best: Spencer agreeing not to marry Heidi in a courtroom! I mean, he probably negged at it in the last minute because he wants to get MTV to pay him huge bucks to do an actual ceremony...but in the end, the ends did justify the means, and it was the right thing to do.
Worst moment: all the scenes involving Audrina and JB. Ew, ew. You know, I actually liked Audrina at some points this season, but everything about the last few episodes reminded me what a dead-eyed airhead she is. JB is smarter than she is, but it's still like looking at Dumb and Dumber. Check out how unarticulate I am writing this paragraph while I think about them. See, their stupidity is contagious. OK, I feel mean. On a positive note, it was nice of JB to get Audrina a piece of metal to signify their, uh, relationship?
OK. Until next season. (Let it be the final one--please!)