I have to admit I'm a masochist when it comes to games. At first, I only get the happy endings of my beloved characters, but then, in my eagerness to have every ending, every CG, every little bit of music, I play through all the characters even though I hate them.
For example, in Dramatical Murders, I love all the characters except Mink. I really hated him in the first game, even with his good ending, but in Re:Connect, the character redeemed himself a bit with me.
And even though I understand Mink to a certain extent now, I still hate him a little, and yet I played all his endings and more than once haha.