My favourite workout is the one I'm happy to do on a particular day, haha!
Somedays I want to zone out to some good tunes while doing cardio - so I'll do 35 minutes on the elliptical at medium resistance and speed.
Other days, I want to watch a show while I'm working out, so I'll do a 5 minute elliptical workout and then 25 minutes of body-weight and dumbbell strength exercises in front of the tv, followed by another few minutes on the elliptical to relax.
I also like to do a quick warm up of marching or "faux jumping rope" for a minutes, follow by a favourite stretching routine for 15 minutes. Just to work the kinks out.
Sometimes, but infrequently, I'll pull out a workout DVD, like something by Bob Harper or Jillian or Mari WInsor pilates.
(BTW, I also use a FitBit and make sure I get 10,000 steps a day.)