Favorite Season: Season 7, probably. I was a huge David Archuleta fan and I loved so many that season. Either Season 7 or Season 9.
Least Favorite Season: Season 12: It was terrible and the first season I stopped watching half way through EVER since I've watched the show (which I started in Season 3). Mariah and Nicki were horrible, the constant fighting, the mediocre contestants, etc. it was truly one of the worst seasons the show has ever had. The most entertaining part was the auditions episode where Mariah and Nicki were fighting bad, but that got old real quick and I was sick of it being about them constantly. The contestants sucked.