I've got to do something to make up for all those self-absorbed and selfish years when I just, you know, was taking drugs, sitting in my room, doing bad things, whatever.
Any actor who is being honest will admit there's always a small or large part of the real you in every character. It's impossible not to have that.
I heard Nirvana, and discovered that songs could be like poetry, but a little bit more refined: you didn't have to have 20 verses to get your point across.