I have. In fact, I've had a (what I call) slumbering death wish for at least 25 years. I'm 40 years old now.
It's like I am not suicidal to the point where I would do something, but I wouldn't mind not waking up in the morning, or being hit by a car, or what have you.
More serious suicidal thoughts do flare up every now and then, as I deal with depressions and stuff occasionally. I find life pretty tough. I feel out of place a lot too. Like it's not my world. So yeah, I wouldn't really mind leaving. I keep fighting, because I would hate to hurt my parents and sibling. Other than that, meh.

Life is obscene.
Just watch the news and read history books.
You don't have to be Einstein.