I had a friend who was only 2 years in with Parkinson's. He was someone I worked out with at the boxing gym. He was 51 years old, had a beautiful and supportive wife. They had just had a baby girl. He got DBS rather early in the disease because he wanted to be in top shape to care for his baby. He was beaming when he spoke of his wife and baby, he was so excited about being a dad. Out of the blue, he killed himself a few months later.
Sorry, I don't mean to be a downer - most people I know who've had DBS are doing great, but the suicidal thoughts apparently can be real.