Blood on the Ice, Destroy the Dark Brotherhood, A Rise in the East, Laid to Rest, The Taste of Death (Kill Eola), House of Horrors (Good ending, kill the Boethia worshiper and don't go back to the house), Dawnguard (Investigating the recent vampire attacks?)... I'll write if I think of more.
Blood on the Ice, Destroy the Dark Brotherhood, A Rise in the East, Laid to Rest, The Taste of Death (Kill Eola), House of Horrors (Good ending, kill the Boethia worshiper and don't go back to the house), Dawnguard (Investigating the recent vampire attacks?)... I'll write if I think of more.