North America had all the cool dinosaurs, the classics we all know and love: T-Rex, triceratops, stegosaurus, ankylosaurus, etc.
South America: the admittedly cool argentinosaurus but also a bunch of boring dinosaurs.
Chinese dinosaurs: basically just a bunch of feathered proto-birds, boring
European dinosaurs: the admittedly cool plesiosaurs but not much else of interest.
African dinosaurs: way too many copy and paste sauropods.
North America also has tons of synapsids from the Permian and pseudosuchia from the Triassic, to mention nothing of the Cenozoic mammals.
South America: the admittedly cool argentinosaurus but also a bunch of boring dinosaurs.
Chinese dinosaurs: basically just a bunch of feathered proto-birds, boring
European dinosaurs: the admittedly cool plesiosaurs but not much else of interest.
African dinosaurs: way too many copy and paste sauropods.
North America also has tons of synapsids from the Permian and pseudosuchia from the Triassic, to mention nothing of the Cenozoic mammals.