Source: iMore (screenshot)
Something that usually bothers me about playing on a console with a group of people is that you don't really get to interact the same way as you do with a traditional board game. With 1-2-Switch, you and your opponent face each other instead of the screen. While looking at each other, you can mess with the other player to try to win, for example, by jumping to throw the other player off.
This is where the fun really came in for me, being goofy with my opponent. One thing this game encourages is making goofy faces at each other, doing silly poses, and just being ridiculous in general. Doing that with the right people will always make for a good time, but I'm not sure the actual game itself was the cause of enjoyment.