Zelda for sure ...because of this series' first open-world concept with its amazing plethora of rare items/weapons to find. And the art direction is beautiful from its general landscape lighting, articulate rustic nature of shrine patterns, etc.
Mario is okay but the change/inconsistency in the game's art direction made me not 'love' it... especially Ruin Kingdom vs Luncheon Kingdom. But had to get it still just because it was a 'Mario' game.