Did you include that season where the secretary of defence is now President?

S5 is my fav probably because the main bad was sooo damn good at being slimy. That's the season I started the show with.

I'd probably then go with 2, 1, 3,4,LAD,6,8,7 although, I honestly can't remember what happened in what season.

I do like to pretend the show ended in S4 with Jack walking off into the sunset though. Especially considering where LAD ends off and with nothing on the horizon for a finisher to that story.