Welcome Roxie!
If you like dancier step choreography I would say Rhythmic Step or Step Blast.
If you like low impact step aerobics then try Low Max (trickier choreogrpahy) or Low Impact Circuit (basic Choreography), or Low Impact Step (a combo of easy and some tricky steps).
If you like moderate complexity but HIGH INTENSITY STEP, try Imax 2 or Imax 3 or Body Max (the original) or Body Max 2.
If you like circuit workouts with cardio and weights together, try Cardio & Weights, Drill Max, High Step Challenge, Step Jump and Pump
If you like all weights total body high rep, try Muscle Max, Muscle Endurance, or Power Hour
If you like all weights, with heavier weight try Pyramid Lower Body, Pyramid Upper Body or Gym Style Split Workouts
That should be enough to get you started :7