Purely in terms of aesthetics?
1. The hub.
2. Berk
3. Wizarding World
4. Monsters*
5. Super Nintendo World**
* Monsters should be what I'm most excited for, but I have reservations about what the village will look like, how various buildings will be hidden, and how the coaster will be integrated. There's still a chance it ends up being my favorite land in terms of the look and design choices. It remains my most-anticipated land overall.
** Last by default, only because we know exactly what it's going to look like already. There's nothing to discover or be surprised by (except the Donkey Kong area... and we'll have seen that in Japan by the time EU opens, too). It looks great, however.