I own plot 5 in Mist (L) for my FC and plot 6 in Lavender Beds (L) for my private home. I really like Lavender Beds but I'm in love with Mist

For me personally it goes like this:

Mist: All large plots are nice but 5 is the best imo. For a medium I love plot 30 (it was also my first house). Plot 5 and plot 30 in Mist have the best views in-game in my humble opinion.

Lavender Beds: I own plot 6 but 28 is best for a large I think. And 29 for a medium.

Goblet: I don't like anything in the Goblet lol

Shirogane: For large plot 30 without a doubt, for medium 1, 8 and 19 but my preference goes to 8.