Me personally...hmm. Xenoblade Chronicles is an exceptionally well made game. Breath of the Wild as well. But best game ever crafted - not necessarily my favorite - is probably, in my opinion, Chrono Trigger.
The design is just incredibly tight, the writing is absolutely on point, the time travel elements weave an engaging narrative AND impact the gameplay, the art is phenomenal,it's just such a fantastic creation.
And just fyi, I played Chrono Trigger for the first time in 2012, not long before I dove into Xenoblade. So this isn't a nostalgia thing.
Like I said, probably not my *favorite* game. Just the one I feel has the most excellent design.