To be one of the best Zamboni Drivers you need practice and lots of it.
There are a few things that help with a perfect ice make. First, you need a good rink with the right temps and humidity levels. This will help with the water to freeze quickly causing no flooding at the creases.
Know your Zamboni/Olympia ice resurfacing machine. Find that spot that helps you to overlap laps of ice with the lease amount of overlapping as possible. Usually you can find this spot on a newer machine by a crease on the top of the dump tank. If your resurfacing machine has no noticeable creases once you find your mark put a mark on it. This will help with training new employee's on the machine.
Maintenance is so important. To get those perfect ice cuts you need to keep the machine up-to-date. Change your blade monthly. If you keep your blade as long as possible even tho it is still sharp the rust will cause issues. Keep your resurfacer greased and check your hydraulic lines! If you ever get hydraulic fluid on the ice the clean up is horrible and causes a lot of downtime or unhappy customers. The very most important maintenance is keep your water lines, hot water, cold water tanks clean! The lime deposit will affect your water control.
Once you have everything down to this point how do you consistently put down the perfect ice? The biggest tip I can give you is practice but water control knowing how the water will react to the ice and the amount to put on will help you dearly.
Anyways, I hope this helps you and here is what I consider the top 3 traits.
2. Water Control
3. Maintenance of the Machine