This. <3

Because it shows his developed character and that he has a heart

Both shows that he has a heart and doesn't want to be on the bad side. However, this one touched me even more 'cause he knew that, even with his and his parents life on the line, he wouldn't be able to kill another person.

^ True. Also, that was the moment for which side he was going to choose. That moment he made his decision. That was the moment where we truly saw where Draco stands.

But I like his facial expressions when he disarms Dumbledore. I always repeat the lines. I could watch that scene over and over. The other part too. It's hard to chose really. Bellatrix wails in both scenes. So both are good.

Both are pretty good ideas of him showing his best. I just think that defying Voldemort is more than defying psychopathic Bellatrix