Since I found out yesterday that Ledger died, I've been pretty sad over it (not that it's interfering in my life or anything, but it's saddening all the same), he was a tremendous actor and while I didn't always like his films, I enjoyed his performances. His choices were always intersting and he always did a superb job.
What frightens me about his death was that it did appear to be accidental. He had told an interviewer recently that his role as the Joker shook him up, having to portray the violent, sociopathic psyche of a psychopath with zero empathy. Also his recent role in the Bob Dylan biopic had stressed him out and between the two he just wasn't sleeping. Apparently he took Ambien but that'd only give him maybe an hour of sleep, so clearly he overdosed in a fit of insomnia-fuelled distress.
Had this been a suicide, at least there was some pre-meditation, but this was utterly unintentional, he just wanted to get a decent sleep. I find it very scary and depressing how this could happen.
Ledger's death is a huge loss to cinema, that's for sure.