Science victory was the most common form of victory for me. Not really intentional, I'm just a slow mover when it comes to taking over the world... I tend to opt for rushing science and wonders early in the game while being relatively peaceful, then swamping the world with tanks the moment I unlock them (often well ahead of everyone else due to the science rush) and then start rolling them out... but the science rush and wonders leave me advancing so fast and then the wonders run out and all my places have built everything there is bar "MORE UNITS" and I start on the spaceship and... victory!