People riding dragons has a long history in media and literature. Let's take a look.
In Games Workshop's Age of Sigmar once extinct dragons have returned to the Mortal Realms, and they have already started forming bonds with a brand new chamber of Stormcast Eternals.
With these new units, the Stormcast join a long line of dragon-riding warriors on both sides of the alignment aisle, inside and outside the world of Games Workshop. Dragons have been a staple in fantasy literature and films for ages, and whether they represent wise and noble protectors or vicious, dangerous beasts, the sight of a warrior riding one into battle has always been a thematic turning point, both for good and ill depending on WHO is on their back. Some of the greatest heroes and villains of recent history have had a scaly companion, and regardless of how well they performed, their cool factor cannot be denied.
Aelves of Warhammer
While every faction of Elves in the Old World had at least a little affinity with dragons, none shared the same bond with them that the High Elves of Ulthuan, specifically the province of Caledor, were able to create. In the time of Aenarion, the elves made a pact with the noble creatures to fight alongside them against the encroaching hordes of Chaos, and some even agreed to bear their greatest heroes into battle.
When Malekith split from Ulthuan, he too...