10 Best Decisions Klaus Ever Made: The Vampire Diaries
He gave his blood to Damon when Tyler Lockwood bit him.
He cured Caroline when Taylor Lockwood bit her on his behalf to convince Stefan to return his siblings.
He stopped his plans to make his hybrid army.
He helped Elena from the hunter's curse when Elena killed a hunter who belongs to brother of five.
He helped Stefan when a hunter named Rayna Cruz comes after him.
He supported Caroline's school, which is for all supernatural species.
He adopted Marcel Gerard when he was a kid and treated him like family.
He let Katherine die in peace even after all her doings.
He sacrificed his life for his family. He chose to kill himself when Hollow controlled him, as he wanted to save her daughter Hope.