Currently (my preferences change all the time, and I'm a bit fickle), my 5 faves (in no particular order) are:
1)Butts and Guts (it hits right what's it's supposed to hit)
2) Imax 2 (fun and intense without being over-the-top, and Cathe looks so cute in her pigtails and in red!)
3)PLB (the perfect selection of lower body moves, even without the ball/floor work)
4)Boot Camp (done as the "all but core" premix, followed by the "core only" premix, because I hate going back and forth between standing and floor work)
5)Kick Max
This last one is really a surprise to ME! When I first got KM, I thought the KB segment was too short and had to many pivot moves, HATED the over-the-top impact in the blasts, and was so disgusted with it after one try---even though I wanted to like it because Cathe's form is her best ever, she looks great, and I liked the music, though it's not quite loud enough--I didn't even try the leg drills and Ebayed it pronto.
Then, recently, I was hankering for a new KB workout, had modified Amy Bento's (to make it flow more smoothly with correct KB form), and Tracey Staehle's (to make it more space friendly, and also doing it in its entirety to make up for the fact that I thought the KB section was too short.
Since I was able to tweak and modify these two workouts (which I didn't like 'as-is') and end up liking them, I decided to give Cathe a second chance.
After taking out some of the pivots and taking the 'too-jumpy' moves to my rebounder, I really like this workout now (though I still wish the rockin' music were louder).