Was a big fan of her early music and some of her more recent stuff was very good too.
She was fearless and had huge courage to back her convictions. She was on the brink of becoming a major star in the US when she went and ripped up a picture of the Pope on Saturday Night Live. It's kind of forgotten now how big the backlash was, but she essentially killed her own chances of major pop stardom, but in the end she was proven correct.
Yes, she had a troubled life, but that doesn't make her passing at 56 any less tragic.
RIP Sinead.