What's your least favourite nation and why?

There seems to be a strong dislike for Natlan in the Genshin community so I'm curious how many people will say Natlan's their least favourite lol.

For me Natlan is in my top 3 favourites, but I'd say sumeru is my least favourite (I have like 20% exploration on each area). The archon quest was good but I dont like the exploration and the characters dont really stand out to me.