The five people I would not cry over if they weren't ever in existence.
Max- Max Medina was a very nice guy, but I wish that his and Lorelai's relationship hadn't gotten that far.
Dean- I did not mind Dean in the earlier years, but it was a bad move when he and Rory had sex. They should have never gotten back together.
Logan- I dont completely hate Logan, but I would have much rather had Rory be with either Jess or Marty. Nobody has love for poor Marty anymore

Gigi- She is just there. Her character doesnt really hurt or make the show. I do like the fact that it was because of Sherry being pregnant that Lorelai and Chris potentially getting back together was prolonged.
April- April was not needed at all. That pissed me off so bad when she came on to the show. Gilmore Girls was fine enough without all that drama.