4, eh? All time faves are horse & side lunges. Love the side lunges into lateral mambo in RS. Also love repeaters when you're doing 3 different movements. (Name??) And in general, I like high impact moves.
I just did Step Works for the first time! Wow what a blast! So I need to add:
Pendulum Across - this is the funnest thing I have ever done!
Over Face In Over (across the length of the board)
Power Mambo
Power Lunges (wow those were great!)