Quote Originally Posted by Kodos
But I think selfish, by definition, is about a morally unacceptable level of concern with one's self. I think if life is so utterly miserable that suicide is a logically justifiable option, that it's not really being selfish, most likely. That it falls within morally acceptable levels of concern for self.
selfish: "devoted to or caring only for oneself; concerned primarily with one's own interests, benefits, welfare, etc., regardless of others."

I personally don't see this in itself as morally unacceptable. Like you said, sometimes it's reasonable to be self-interested, and sometimes it's not.