I got your back Ruv!

It's the same thing with engineering. For us it's the challenge. Make a car that can do X while still getting 30 miles per gallon.

Everything we do is evolutionary. While the occasional revolution happens, typically it happens when a system is more understood. For example, I'd say Finite Element Analysis has revolutionized engineering because it allows us to finally make accurate predictions based on a mathematical model, as opposed to experimental data. This means that the cost of designing something drops a ton, and it also means that more radical designs can be tested for viability.

Creativity is there, but for engineers it's all about the challenge and curiosity. The challenge is a motivator, and curiosity the reason.