I'd feel broken. If I felt angry, it would only be because I felt I was partially responsible for not supporting them enough or for not stopping them, whether that was true or not.
I remember my family felt very angry when it came to my own attempts and my friend, when she lost her cousin to hanging, felt so lost for a long time but never angry.
To those who say its cowardly and greedy, you're being ridiculously unfair. It's actually more selfish to think that way - you're thinking more about what you have to cope with post-suicide than bearing in mind what actually got this poor guy or girl to such a point. I mean, having experienced it first hand, I can tell you that you are literally going to feel like you have no options. The mind is so damn powerful and knowing the right thing to do does not mean you can apply it.