For this I could list a thousand examples but I will confine myself to one per storyline.
Pre Barnabas storyline Carolyn for [spoiler]how she ran after Burke and made a fool out of herself over him in spite of the fact that she was warned over and over that he was only using her. Laura for wanting to burn her son.[/spoiler]
Early Barnabas storyline: Barnabas himself for [spoiler]how he treated Willie, Maggie and Julia. How he expected Maggie to just give up her existence to be a different person.[/spoiler]
1795: Angelique for [spoiler]how she used innocent people to get her revenge on Barnabas, killing some, making others sick, and expecting Vicki to die for her crimes. There may be a tie here with Trask and Nathan Forbes who were utter creeps.[/spoiler]
Adam storyline: Cassandra for [spoiler]the dream curse[/spoiler] Also Nicholas and Adam himself at times.
Werewolf and Quentin's ghost storyline: The ghost of Quentin.
1897: Gregory Trask, the fiend, for simply existing, along with all the rest of his heinous deeds! Others include Aristede, Petofi, amongst others.
Leviathan: Sky Rumson for [spoiler]his hypocrisy, expecting his wife to be honest with him while he hid secrets from her. [/spoiler] Also Bruno but I always hate Bruno!
1970 Parallel time: Angelique for [spoiler]murdering Alexis and taking her place, tormenting Maggie, and murdering Will Loomis.[/spoiler]
1995: The ghost of Gerard Stiles for being so darn ugly, and for [spoiler]forcing Julia to betray Barnabas. Though it led to that sweet "Never without you" scene[/spoiler]
Summer of '70: Ghost of Gerard, and Roxanne the vampire for [spoiler]biting Maggie out of jealousy over Sebastian[/spoiler]
1840: Judah Zachary for [spoiler]possessing Gerard and causing him to be a little bit more wicked than he already was, Gerard for already being wicked. Samantha for being such a nit and choosing Gerard over Quentin which makes no sense![/spoiler]
1841 parallel time: Brutus Collins for [spoiler]cursing his family. What a bozo brain! Morgan for being an obnoxious jerk, and Catherine for marrying him for his money rather than marrying the man she truly loved.[/spoiler]
I guess it's hard to confine myself to only one per storyline lol!
Alondra