I don't use rotations, I can't. I never stick to them. Even if I write them out and design them, I just end up doing something else anyway. I wake up in the morning and decide what sort of day it's going to be. Was it cardio yesterday? Right then it's weights today. Which one? Hmmm, PLB, LL or PS legs? Whatever I have the motivation to do. Whatever motivates you to keep going and be active is way more important than sticking to arotation even if it kills you, which it will, with boredom and the inevitable demotivation and falling off the bandwagon.
If you are screaming with the dullness of the SS, whatever that is, then stop doing it an do the Cathe's you love! There's no set recipe for results except: consistency. If you are up and down all over the place because boredome makes you a stop/start exerciser, then you will not see "results". You need to train each body part twice per week, and do 3-4 cardio routines, working along the crosstrain principle and varying the intensity of the cardio sesssions. That's like a general baseline that will get you "results." How you choose to cover those bases is up to you.
It doesn't really matter, for your improved health and to ward off serious diseases as you age, what you do or when as long as you keep moving! So, ditch the boredom routine and get jumping with what you fancy!
Clare