Shadow Archetype: To Guinan. Being the same race, both experiencing the Nexus, they essentially share a backstory. Soran is what happens when those mystical powers are used for evil instead.
And with Picard. They are both scarred by encounters with the Borg, and have lost their families. Soran is willing to let others die to get what he wants, Picard isn't.
The Sociopath: Soran manipulates everybody he meets, and he doesn't care if he annihilates a populated planet in his quest to reach the Nexus.
Straw Nihilist: After his homeworld's destruction, he's haunted by the inevitability of death, to the point that he no longer cares who suffers from his plan to return to the Nexus.
Ungrateful Bastard: The Enterprise crew rescue him after the attack on the Amargosa station, and he repays them by nearly getting them killed. Twice.
Used to Be a Sweet Kid: If what he said to Picard was true, he claims he wouldn't have hurt a fly before his world was destroyed.
Woobie, Destroyer of Worlds: He lost his homeworld and family to the Borg, and then he lost his ideal fantasy in the Nexus when he was beamed aboard the Enterprise-B. He's now willing to destroy entire solar systems as part of The Plan to return to the Nexus.
Ensign Newbie: How this dweeb got command of the Enterprise-B is anyone's guess.
Hero of Another Story: He and the Enterprise-B crew would have expanded universe stories of their own, which help improve his reputation.
The third starship to bear the name.
The Alleged Starship: Most of the ship's critical systems aren't actually installed for the shakedown cruise.
Hero of Another Story: Despite a disastrous test flight, the Enterprise-B would have a distinguished service.
The Only One: Perhaps the most egregious example in the franchise. The Big E-B departs Earth for a routine shakedown cruise and picks up a distress call. Despite being close to the capital of the Federation and headquarters of Starfleet, the Enterprise is the only one that can respond.
Running Gag: The system that Kirk needs right now to save the refugees? It won't be installed until Tuesday.