I'm playing TOTK right now and while it's better than BOTW (which I enjoyed), I still much prefer other Zelda games. Skyward Sword is my favorite on Switch, followed by Link's Awakening and then Echoes of Wisdom. It's my first time playing those first two, and I absolutely loved them.

I'm a sucker for the classic Zelda formula: find dungeon, solve puzzles, get new ability, use ability to defeat dungeon, repeat.

BOTW and TOTK don't have that, the "dungeons" suck, the puzzles are even more gimmicky, and I absolutely hate crafting mechanics (cooking and elixers suck). But they're still fun, so I play them.

If you'll only play one, play TOTK. If you'll play both eventually, play BOTW. If you're looking for a classic Zelda experience, get something else.