And then I grew up and realized just how utterly self-centered that lines really is.
Well, it's tragic, of course. But it shouldn't stop there. When Angel is at his best, all that guilt is what motivates him to act and help others. When he gets absorbed in himself everything just spirals out of control. All of which reminds me of this fabulous quote by Matt Smith:

"That's what interests me about The Doctor because, actually, look at the blood on the man's hands... Which is why I think he has to make silly jokes and wear a fez. Because if he didn't, he'd hang himself."