The Nintendo 64 was the very first console which was my own. Subsequently, as was Super Mario 64 being my first, self-owned video game.
Months after the release of Super Mario 3D Land I still haven't played it until a colleague chastised me. My following paycheck, I downloaded it through the 3DS eShop.
I need to be ashamed of myself. 3D Land is the closest game to Super Mario 64 after the Galaxy series, and returned me to the 3D Mario platforming I grew up on.