Desert Temples.

They don't look great, but often offers great loot especially when you just started a new world. It also has 4 chests and may give a useful enchanted book or an enchanted golden apple.

I like plains, desert or savanna villages with blacksmiths. Iron armor and tools, diamonds, obsidian and not to forget haybales

Villages. Fun to ransack.

I'd say the Taiga Villages. They're the only variant you can find in a forested biome, and I just like their aesthetic with the campfires and spruce wood.

For a long time I've always thought Woodland Mansions were cool, but finding them is such a chore. Plus with all the new blocks that have been added since their implementation, Mansions could look more epic.

Hmmm...

Good question. For the design, I'd say underwater temples !

good question, I may choose ancient cities, cuz of the sculk, the mighty warden, and that goofy useless (for now) amogus-shaped portal frame

Nether Fortress

Ancient City

Mainly bc of the design and the God apples

From a purely practical perspective, probably villages. But End cities provide an interesting challenge and are worth the loot