I've quit on three seasons to date. When things stop going my way, I'm like the kid who takes his ball and goes home. It's mainly convenient 'twists' that stack the odds in a popular houseguests favor that causes me to lose interest.

Big Brother 9: Not so much like the next two seasons, but I just found all of the houseguests super unlikable. I cancelled my live feeds pretty early because I wasn't watching much, and eventually stopped with the episodes about 2/3 of the way through because I genuinely didn't care how it ended.

Big Brother 13: Rachel Reilly really, really bothers me. More than any houseguest in BB history. I realize people like her and the drama she brings, but her voice, her personality and the way she dominates anything she's involved with is too much for me. So I was very upset with the returning houseguests, and it was the first season I didn't get the feeds right from the start. My memory is fuzzy, but I think they got rid of Brendan super early and I was rallying behind the idea the duo would be out of the game quick. I stopped watching the episode they brought Brendan back into the game.

Big Brother Canada 3: So let me preface this by saying I didn't watch this season on time, so I obviously didn't watch any live feeds at all (also I'm from the US anyway). Buuut Sarah was portrayed on the show as hateful and whiney. So I thought he/she was hateful and whiney, and he/she was my least favorite. I watched the majority of the season without knowing who most people liked, and was shocked when I found out people liked him/her. I stopped watching the episode where Brittnee won the 'Super Power'. I decided I would look up the winner of the season, and if it was Sarah or Brittnee, I wouldn't finish. I didn't finish.