Take 'Batman: Year One'. It's characterized by its noir - style storytelling. It shows Batman's early days, his struggles to establish himself in Gotham. 'Superman: Red Son' is also interesting. It presents a different origin for Superman, where he lands in the Soviet Union instead of the United States, and this changes the whole dynamic of the DC universe in that story.
Many of the popular ones in the top 100 have complex characters. 'Green Lantern: Rebirth' is a good example. It brings back the Green Lantern in a new and exciting way, exploring his powers and his place in the DC cosmos. 'Catwoman: Selina's Big Score' gives us a deeper look into Catwoman's character, her motives, and her relationships in the criminal underworld of Gotham. These novels often combine action, drama, and character development to make them engaging.