Yes. He changed and learned how to stop being a dick, which deserves my respect.

Yes, very much so. I love his growth in character from an arrogant child to a mature young man.

I wish there was a "kind of" option. On the one hand, the way he treated Severus Snape was inexcusable, but I think he did learn from his mistakes and become a better person so I have mixed emotions about him.

yepe. I like him as a young prankster too.