Season 1 is a classic but goes on a bit of a tangent in the end when Jack Bauer's wife gets amnesia.
Season 2 is pretty standard, and the villains lacked a compelling story.
Season 3 was slow to start, but Ryan Chappelle's silent clock was absolutely a highlight of the series.
Season 4 was all over the place, but I really liked how they tried to reboot the show with characters like Audrey, Heller, and Erin. It's a shame they kind of undid it by bringing back Palmer, Tony, and Michelle.
Season 5 is my favourite. President Logan makes that season.
Season 6 is terrible.
Season 7's attempt to be thoughtful is actually really shallow. I enjoyed it mostly because of Renee Walker, but by the end it just seemed like they were going through the motions. I hated that the season ended with Kim giving the doctors the go-ahead to treat Jack's infection. It really lowered the stakes for Season 8.
Season 8 was still great though. It's very underappreciated. It started slow, but it really brought the characters into some intense grey territory. The series finale was way too safe.
I also enjoy fall.
Season 2 was the best. No character was better in the entire run of 24 than George Mason.