I joined this party early in 2006. Its a great show, but it does seem to be steadily declining in its ability to intrigue me, and in coming up with fresh stories and characters. 1 and 2 tower above the other seasons. 3 was easily my least favorite, and I hated it. 4 was an improvement, but still just OK. 5 was an improvement again, but also just alright.
They STILL haven't managed to deliver a better scene than spoiler (click to show/hide)
Mason's death. That will go down as the best scene and episode in 24 history. Mason was the man.