Eh, if someone said were to put a gun to my head and said You can either only play Breath of the Wild or play everything 2018 had to offer, Id still pick Breath of the Wild. Even with Smash being great. 2017 wins by default because BotW > 2018 combined. And then theres Mario Odyssey as well.
Thats okay though, I wasnt expecting any game that would be as amazing or even better, Im realistic. 2018 was still very good and in the end I bought more in 2018 than I did in 2017.