All are interesting but I like Titans the best. Titan lore fits perfectly into what makes a Titan a Titan. We are the wall that protects this city from the darkness. We held the battle of six fronts without a single loss. We surrender ourselves to the cause entirely, that's why zavala is so damn serious. A good example is Kabr the legion less getting stuck in the vault of glass and sacrificing his very being to create the aegis of light. A Titans duty is never finished, Saladin kept his watch in solitude for centuries. I dunno, Titan lore just completely personifies the essence of Titans.