Once again, you choose a topic so broad that you could cover an airstrip with it.
Sidescrollin': Super Mario World or Yoshi's Island
3-D Adventurin': Ocarina of Time or Super Mario Galaxy
Role-Playin': EarthBound, then The Thousand-Year Door
Puzzlin': Tetris Attack
Multiplayin': Super Smash Bros. Brawl (Yes, this is combining many genres into one)
I can't choose just one. Every once in a while I'll have this great conflict within my head: What do I want to play?