I love that Angel is willing to fight for what he believes, even if it goes against what everyone else believes. He is a man of the belief that everyone has a chance at redemption, and I admire that about him.
There are many instances where people had given up on someone (Faith, Darla) and Angel still fought for them. That's admirable and makes him a champion of the people who need a hero most.
Oh, and I love his terrible early season velvety, shiny wardrobe 😛 so adorable!