@pokeolivr Oh, that one looks amazing as well! My favorite is actually the other one with the Legendary Birds (Japanese Fossil):
Picture source: @thetropicalwoodsman 's collection thread.
The Sun & Moon Sky Legend box you posted is definitely up there among my favorites though. You know, I think I’m gonna order one of those now that the prices are still reasonable. 
Let’s see what it will be worth 10 years from now. 
Some other booster boxes I really like:
Japanese Clash at the Summit (L3):
Japanese Split Earth (E4):
Australian Red Logo Fossil:
English Skyridge:
English Legendary Collection:
PS: Here a similar thread from about a year ago, to see the favorites of some other members.
Greetz,
Quuador