I can't choose one, but some of my favorites are:
Good Egg Galaxy
Gusty Garden Galaxy
Toy Time Galaxy
Melty Molten Galaxy
Rolling Green Galaxy
Currently Playing: Mario Kart 7, Mario Kart 8, Luigi's Mansion: Dark Moon, The Legend of Zelda: Majora's Mask, Super Smash Bros for Wii U
Predictions:
Super Mario Galaxy will pass Super Mario 64 in total sales CORRECT!