2 pins stand out from my childhood which really hold sentimental value:

I put so many hours on a Space Odyssey at a local skating club. My dad ended up buying one of these for our house in Las Vegas. Loved the middle moving target shot.

Secondly, the first pin I ever bought as an adult was Fire Power (for $450) at a local auction. I had previously put so many quarters into that pin as well. I loved the machine gun sounds of the game.

I have so many great memories of both pins; and in many ways they both got me hooked on this amazing hobby.